Response of phalaris to differing water regimes or grazing treatments as measured by basal bud weight, water-soluble carbohydrates, and plant tillers

2004 ◽  
Vol 55 (8) ◽  
pp. 879 ◽  
Author(s):  
G. M. Lodge
Keyword(s):  
Water Treatment ◽  
Stem Elongation ◽  
Field Studies ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
Mean Values ◽  
North West ◽  
Management Intervention ◽  
The North

Studies of Phalaris aquatica L. were used to collect data for basal bud (all below ground shoot material) weights, their water-soluble carbohydrate (WSC) content, and green vegetative tillers. A glasshouse study of cvv. Australian and Sirosa was conducted on regrowth after 26 days of plants previously exposed to either non-limiting or limiting (simulated Mediterranean environment, and 3- or 6-week drought) watering treatments. The other studies were of Sirosa phalaris pastures that had previously been subjected to continuous or lenient (resting in both spring and autumn each year) grazing by Merino wethers. In the glasshouse study, weight of basal buds (g/plant) was highest (13.88 g/plant) for Australian plants in the non-limiting water treatment, but not significantly different among watering treatments for Sirosa plants. Basal bud WSC values ranged from 2126 mg/plant (Australian phalaris, non-limiting water) to <200 mg/plant in 6-week drought and Mediterranean watering treatments of both cultivars. Tiller regrowth was higher in Australian non-limiting water treatment compared with all other treatments. Post-drought field studies (6 weeks tiller regrowth in May–June 1995) showed that plants in continuously grazed treatments had basal bud weights <11 g/plant, basal bud WSC contents <600 mg/plant, and green vegetative tiller weights <2.5 g/plant, compared with values of >11 g/plant, >1300 mg/plant, and >3.6 g/plant, respectively, for treatments rested for 12 weeks in both autumn and spring. At the end of spring 1995, when plants were post stem elongation and anthesis, basal bud WSC (mg/plant) was significantly higher in autumn–spring rest treatments compared with plants that were continuously grazed (mean values for 2 sites of 2889 and 1458 mg/plant, respectively). From these data, threshold values of basal bud WSC contents of <600 mg/plant after 6 weeks of regrowth in autumn–early winter, or <2000 mg/plant in flowering plants in late spring in continuously grazed pastures >3 years old, were proposed as useful indicators that management intervention may be required to maintain Sirosa phalaris persistence on the North-West Slopes of New South Wales.

scholarly journals Crop and environmental attributes underpinning genotype by environment interaction in synthetic-derived bread wheat evaluated in Mexico and Australia

2008 ◽  
Vol 59 (5) ◽  
pp. 447 ◽  
Author(s):  
M. Fernanda Dreccer ◽  
Scott C. Chapman ◽  
Francis C. Ogbonnaya ◽  
M. Gabriela Borgognone ◽  
R. M. Trethowan
Keyword(s):  
Grain Filling ◽  
Water Soluble ◽  
Environmental Drivers ◽  
High Yield ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
Recurrent Parent ◽  
Environment Interaction ◽  
Yield Data ◽  
North West

Synthetic backcrossed-derived bread wheats (SBWs) from CIMMYT were grown in the north-west of Mexico (CIANO) and sites across Australia during 3 seasons. A different set of lines was evaluated each season, as new materials became available from the CIMMYT crop enhancement program. Previously, we have evaluated both the performance of genotypes across environments and the genotype × environment interaction (G × E). The objective of this study was to interpret the G × E for yield in terms of crop attributes measured at individual sites and to identify the potential environmental drivers of this interaction. Groups of SBWs with consistent yield performance were identified, often comprising closely related lines. However, contrasting performance was also relatively common among sister lines or between a recurrent parent and its SBWs. Early flowering was a common feature among lines with broad adaptation and/or high yield in the northern Australian wheatbelt, while yields in the southern region did not show any association with the maturity type. Lines with high yields in the southern and northern regions had cooler canopies during flowering and early grain filling. Among the SBWs with Australian genetic backgrounds, lines best adapted to CIANO were tall (>100 cm), with a slightly higher ground cover. These lines also displayed a higher concentration of water-soluble carbohydrates in the stem at flowering, which was negatively correlated with stem number per unit area when evaluated in southern Australia (Horsham). Possible reasons for these patterns are discussed. Selection for yield at CIANO did not specifically identify the lines best adapted to northern Australia, although they were not the most poorly adapted either. In addition, groups of lines with specific adaptation to the south would not have been selected by choosing the highest yielding lines at CIANO. These findings suggest that selection at CIMMYT for Australian environments may be improved by either trait based selection or yield data combined with trait information. Flowering date, canopy temperature around flowering, tiller density, and water-soluble carbohydrate concentration in the stem at flowering seem likely candidates.

Relationship between yield, carbon isotope discrimination and stem carbohydrate concentration in spring wheat grown in Ningxia Irrigation Region (North-west China)

2010 ◽  
Vol 61 (9) ◽  
pp. 731 ◽  
Author(s):  
Lin Zhu ◽  
Shu Hua Li ◽  
Zong Suo Liang ◽  
Zhan Feng Zhang ◽  
Xing Xu
Keyword(s):  
Carbon Isotope ◽  
Carbon Isotope Discrimination ◽  
Flag Leaf ◽  
Water Soluble ◽  
Stem Length ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
Isotope Discrimination ◽  
North West ◽  
Carbohydrate Concentration

Carbon isotope discrimination (Δ) in flag leaf, grain and basal stem, grain yield (GY), and harvest index (HI), were determined in a collection of 20 bread wheat cultivars (landraces, released cultivars and advanced lines) in Yinchuan, located in the central region of the Ningxia region (North-west of China), in 2007 and 2008. In 2008, specific stem DW (SSDW) and carbohydrates, including water-soluble carbohydrate (WSC), non-water-soluble carbohydrates (NWSC) and total non-structural carbohydrate (TNSC) in stem were also measured. Relationships between GY, HI, SSDW, accumulation and mobilisation of stem carbohydrates and Δ were analysed. There were positive and significant correlations between grain Δ, basal stem Δ and GY in 2007 and 2008. A significant and positive correlation between Δ and HI was found. In 2008, positive correlations were recorded between stem WSC concentration, SSDW sampled 7 days after anthesis and Δ. Carbon isotope discrimination was associated positively with remobilisation efficiency of stem WSC and TNSC. While negative relationships were noted between Δ and SSDW at maturity, stronger association was noted between Δ, carbohydrate concentration, accumulation and mobilisation efficiencies on stem length basis than on stem DW basis. In conclusion, there is a good relationship between Δ and carbohydrate in stem of wheat when irrigation does not meet the crop’s water requirement and wheat experiences a slight water stress after anthesis.

The assessment of herbage legume varieties. II. In vitro digestibility, water soluble carbohydrate, crude protein and mineral content of primary growth of clover and lucerne

1966 ◽  
Vol 66 (3) ◽  
pp. 351-357 ◽  
Author(s):  
W. Ellis Davies ◽  
G. ap Griffith ◽  
A. Ellington
Keyword(s):  
White Clover ◽  
Crude Protein ◽  
Dry Matter ◽  
Red Clover ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
In Vitro Digestibility ◽  
Primary Growth

The primary growth of eight varieties of three species–white clover (3), red clover (4) and lucerne (1)–was sampled at fortnightly intervals and the percentage dry matter, in vitro digestibility, crude protein, water soluble carbohydrates, P, Ca, K, Na and Mg were determined.Differences between species were nearly always significant and the general order of merit was white clover, red clover and lucerne. The exceptions were for dry-matter percentage where this order was reversed, and red clover had the lowest Na and highest Mg content.

scholarly journals Biochemical parameters variations with season, age, sex, parity and pregnancy in crossbred goats raised in Tiaret, Algeria

2021 ◽  
Vol 8 (1) ◽  
pp. 69-79
Author(s):  
Berrani Abdelkader ◽  
Meliani Samia ◽  
Bourabah Akila
Keyword(s):  
Significant Influence ◽  
Biochemical Parameters ◽  
Physiological State ◽  
Mean Values ◽  
North West ◽  
The North ◽  
Nutritional Conditions ◽  
Physiological Stage ◽  
The Mean ◽  
Calcium And Phosphorus

Abstract The aim of this study was to determine the influence of season, age, sex, parity and gestation status on some biochemical parameters in local cross-bred goats raised in Tiaret, Algeria. Ninety cross bred local goats, from 2019 to 2020, aged between nine and seventy-two months at different physiological stage were used. Animals belong to different farms in Tiaret located at the north-west Algeria (35°22’ N, 1°19’ E). The mean values of triglycerides, creatinine and calcium were significantly (p<0,05) higher in winter than in spring. The physiological state of the goat had a significant influence (p<0,05) on cholesterol, urea, total proteins, calcium and phosphorus, with a high average values in non-pregnant goats, while triglycerides and globulin had significant higher values in postpartum and pregnant femals, respectively. In our work, parity had a significant influence (p<0,05) on cholesterol, calcium and phosphorus, with high average values in young goats and a significant influence (p<0,05) on triglycerides and creatinine with high average values in primiparous ones. Age significantly influenced (p<0,05) cholesterol, triglycerides, total protein, calcium and globulin. The results obtained from this study could serve as reference values for the local goats and other regions or countries with similar climatic and nutritional conditions.

scholarly journals Changes in root porosity and water soluble carbohydrates in rice (Oryza sativa L.) under submergence stress

2019 ◽  
Vol 17 (4) ◽  
pp. 539-544
Author(s):  
Md Juiceball Hassan ◽  
Md Masudul Karim ◽  
Md Amirul Islam ◽  
Md Habibur Rahman Pramanik ◽  
Md Alamgir Hossain
Keyword(s):  
Stress Condition ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
Susceptible Cultivar ◽  
Rice Cultivars ◽  
Root Porosity ◽  
Submergence Stress ◽  
Water Soluble Carbohydrates ◽  
Water Soluble Carbohydrate

Submergence stress at early vegetative stage is one of the most important constraints in the productivity of rice in Bangladesh. Submergence causes yield loss of rice at Aman season in Bangladesh and therefore, it is necessary to develop submergence tolerant rice cultivars. A pot experiment was conducted at the net house of Department of Crop Botany, Bangladesh Agricultural University, during Aman season from July to December, 2017 to evaluate the changes in root porosity and water soluble carbohydrates (WSCs) associated with submergence tolerance in rice. The experiment consisted of two factors—(i) Rice cultivars (Binadhan-11, Binadhan-12, BRRI dhan51 and BRRI dhan52 as tolerant and BRRI dhan49 as susceptible) and(ii) Submergence stress: Submergence for 14 days at vegetative stage and control. Submergence stress was imposed by dipping of pots into a water tank with about 90 cm depth of water while the control plants are maintained in the pot house of the field laboratory. The plants were sampled at seven days interval during submergence to determine the changes in root porosity and to examine the contribution of shoot reserves for their survival. The root porosity was measured by pycnometer method and water soluble carbohydrate was measured by the anthrone method. Tolerant cultivars showed greater root porosity development in both control and stress condition but the susceptible cultivar showed significantly lower root development in stress condition. Higher root porosity might help tolerant cultivars to survive in submergence stress more efficiently. Tolerant rice cultivars had high initial soluble carbohydrate than the susceptible one. Under submergedcondition, the tolerant cultivars showed slow depletion of water soluble carbohydrate compared to susceptible cultivar. Higher carbohydrate contents in tolerant cultivars might act as buffer stock during submergence for their better survival and growth. J Bangladesh Agril Univ 17(4): 539–544, 2019

Effects of cutting and grazing on newly sown plants of Phalaris aquatica cv. Sirosa at Tamworth, New South Wales

2007 ◽  
Vol 47 (11) ◽  
pp. 1351 ◽  
Author(s):  
G. M. Lodge
Keyword(s):  
Stem Elongation ◽  
Tiller Number ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Phalaris Aquatica ◽  
Basal Cover ◽  
South Wales ◽  
Water Soluble Carbohydrates ◽  
Plant Frequency ◽  
Fertiliser Application

A field study was conducted (1994–97) to investigate defoliation time and frequency effects on a newly sown stand of phalaris (Phalaris aquatica cv. Sirosa). Defoliation treatments were applied from spring 1994 to autumn 1995 and effects on plant frequency and basal cover monitored until June 1997. The experimental design was a randomised split-plot in three replicates, with 45 main plots and 90 subplots. Main plots included three types of defoliation (two cutting heights or grazing with Merino sheep) applied at four different times (early stem elongation, anthesis, end of summer and end of autumn) and an undefoliated control. The main plots were divided into two subplots for frequency of defoliation (once only or cut every 8 weeks). In September 1995, none of the treatments had a significant effect on plant frequency, basal cover, green tiller weight and weight of individual tillers. However, there were significant (P < 0.05) effects of defoliation type on green tiller number, defoliation time on basal bud weight and water soluble carbohydrates and defoliation type and frequency on basal bud water soluble carbohydrates. In February and April 1996, there were significant effects of defoliation time on green tiller number and weight, basal bud weight and water soluble carbohydrates. In 1996, Sirosa phalaris plant frequency and basal cover values were generally higher (P < 0.05) in the undefoliated control compared with those defoliated at early stem elongation. However, despite fertiliser application and moderate grazing, Sirosa phalaris plant frequency had declined to a mean of 23.6% by February 1997 and to <10% by June 1997.

Genotypic variation in water-soluble carbohydrate accumulation in wheat

2006 ◽  
Vol 33 (9) ◽  
pp. 799 ◽  
Author(s):  
Sari A. Ruuska ◽  
Greg J. Rebetzke ◽  
Anthony F. van Herwaarden ◽  
Richard A. Richards ◽  
Neil A. Fettell ◽  
...  
Keyword(s):  
Genotypic Variation ◽  
Dry Weight ◽  
Grain Filling ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
Broad Sense Heritability ◽  
Carbohydrate Accumulation ◽  
Sequential Mechanism ◽  
Water Soluble Carbohydrate

The water-soluble carbohydrate (WSC) that accumulates in the stems of wheat during growth can be an important contributor to grain filling, particularly under conditions when assimilation is limited, such as during end-of-season drought. WSC concentration was measured at anthesis across a diverse set of wheat genotypes over multiple environments. Environmental differences in WSC concentration were large (means for the set ranging between 108 and 203 mg g–1 dry weight), and there were significant and repeatable differences in WSC accumulation among genotypes (means ranging from 112 to 213 mg g–1 dry weight averaged across environments), associated with large broad-sense heritability (H = 0.90 ± 0.12). These results suggest that breeding for high WSC should be possible in wheat. The composition of the WSC, examined in selected genotypes, indicated that the variation in total WSC was attributed mainly to variation in the fructan component, with the other major soluble carbohydrates, sucrose and hexose, varying less. The degree of polymerisation (DP) of fructo-oligosaccharides was up to ~13 in samples where higher levels of WSC were accumulated, owing either to genotype or environment, but the higher DP components (DP > 6) were decreased in samples of lower total WSC. The results are consistent with fructan biosynthesis occurring via a sequential mechanism that is dependent on the availability of sucrose, and differences in WSC contents of genotypes are unlikely to be due to major mechanistic differences.

scholarly journals Occurrence of Antibiotic-Resistant Bacteria and Genes in Two Drinking Water Treatment and Distribution Systems in the North-West Province of South Africa

Antibiotics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 745
Author(s):  
Collins Njie Ateba ◽  
Naledi Mahalia Tabi ◽  
Justine Fri ◽  
Marie Ebob Agbortabot Bissong ◽  
Cornelius Carlos Bezuidenhout
Keyword(s):  
South Africa ◽  
Drinking Water ◽  
Water Treatment ◽  
Distribution Systems ◽  
Drinking Water Treatment ◽  
Coliform Bacteria ◽  
Resistant Bacteria ◽  
North West ◽  
The North ◽  
North West Province

With the increasing spread of antimicrobial resistance, there is growing attention to the contribution made by drinking water systems. The potential health impact of two drinking water treatment and distribution systems (A and B) in the North-West Province of South Africa was determined by investigating the water quality and occurrence of antimicrobial-resistant heterotrophic bacteria and genes in the raw and treated water over four seasons. Most of the physicochemical parameters except for electrical conductivity were within permissible limits. Coliform bacteria reduced from raw to potable water except for counts higher than the threshold recorded in Summer and Winter. A total of 203 heterotrophic bacterial isolates were recovered on chromogenic R2A medium and subjected to susceptibility testing to twelve antibiotics. Most of the isolates were resistant to β-lactam antibiotics and Trimethoprim, whereas they were susceptible to Ciprofloxacin, Erythromycin, and Neomycin. The proportions of Cephalothin and Kanamycin-resistant isolates were significantly higher (p < 0.05) after treatment for site A, compared to significantly lower β-lactam, Oxytetracycline, and Trimethoprim-resistant isolates for B. Over 50% of isolates were of high risk, indicating their origin from high antibiotic-use sources. Seventy-one (35%) isolates were multidrug-resistant, out of which the majority (53.5%, n = 38) possessed the strA gene, followed by strB 21 (29.6%), dfrB 13 (18.3%), aadA 11 (15.5%), blaCTX-M 5 (7.0%), and tetA 3 (4.2%). The 16S rRNA gene sequences of the isolates revealed strains belonging to eight bacterial families, some of which are clinically important.

Preventing trihalomethane formation: the ability of granular activated carbon and brimac media to remove colour and total organic carbons, from drinking water in the north west of Scotland

2010 ◽  
Vol 10 (4) ◽  
pp. 526-533
Author(s):  
K. M. Courtnadge ◽  
A. Muir ◽  
S. Sandilands ◽  
J. Martin
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Granular Activated Carbon ◽  
Fulvic Acids ◽  
Design Solution ◽  
Remote Communities ◽  
North West ◽  
The North ◽  
Toc Removal ◽  
In Series

Background: Granular activated carbon (GAC) and Brimac media has been used for many years in water treatment works to reduce and remove colour and total organic carbon (TOCs). This reduces the formation of trihalomethanes (THMs) formed by disinfection with chlorine. The TOCs arise from humic and fulvic acids found in source waters for many, small, scattered remote communities in Scotland. A number of different configurations and empty bed contact times (EBCTs) of GAC and Brimac media were studied at Scottish Waters Acharacle water treatment works using a purpose built pilot plant of flexible design. This was used to establish the absolute design threshold for colour and TOC to meet Scottish Water's water specifications for their removal. Results: The 50:50 combination of Brimac and GAC in series reduced raw colour of up to 39°Hazen to below 10°Hazen and raw TOCs from up to 5.7 mg/l to &lt;2.0 mg/l producing the lowest levels of THMs after chlorine addition of &lt;10 μg/l. An EBCT of 5.4 hours produced an average colour removal of 79.2% and average TOC removal of 79.1%. Conclusions: 50:50 Brimac then GAC in series with an EBCT of 5.4 hours was the best configuration for the removal of colour and TOCs and gave rise to the lowest formation of THMs. The trials have successfully proved how the THM precursors can be removed by the GAC once the colour has been removed by the Brimac. This has not only provided a design solution for Acharacle WTW but the “way forward” for Scottish Water with regard to media change out on their numerous existing GAC plants which are faced with similar problems.

Variation for and relationships among biomass and grain yield component traits conferring improved yield and grain weight in an elite wheat population grown in variable yield environments

2009 ◽  
Vol 60 (8) ◽  
pp. 717 ◽  
Author(s):  
Allan Rattey ◽  
Ray Shorter ◽  
Scott Chapman ◽  
Fernanda Dreccer ◽  
Anthony van Herwaarden
Keyword(s):  
Grain Yield ◽  
Recombinant Inbred Lines ◽  
Yield Component ◽  
Water Soluble ◽  
Grain Weight ◽  
Direct Selection ◽  
Soluble Carbohydrate ◽  
Environment Interaction ◽  
The North ◽  
North Eastern

Grain yield and kernel size (grain weight) are important industry traits for wheat in the water-limited environments of the north-eastern wheatbelt of Australia. These, and underpinning morphological and physiological traits, were evaluated in a population of recombinant inbred lines from the elite CIMMYT cross Seri/Babax, segregating for the presence of the rye translocation (T1BL.1RS). The population was examined to determine the variation among lines, relationships among traits, the extent of line × environment interactions, potential efficiency of direct and indirect selection, and to identify trait combinations that are associated with higher grain yield and grain weight. Transgressive segregation was observed for all traits, and line × environment interaction effects were frequently larger than line main effects. Across six environments ranging in yield from 202 to 660 g/m2, the T1BL.1RS wheat-rye translocation had a positive effect on grain weight (+3.4%) but resulted in decreased grain number per m2 (–6.5%) and grain yield (–3.1%). Realised selection responses indicated that broad adaptation was best achieved by selection for mean performance across the range of target environments. However, specific adaptation for performance in high- or low-yielding environments was best detected by direct selection in those types of environments. A group of broadly adapted Seri/Babax lines exceeded the mean of five cultivars grown commercially in the north-eastern wheatbelt by 8% for grain yield and 17% for grain weight. These Seri/Babax lines with both high grain yield and grain weight were associated with a combination of several traits: earlier flowering, reduced tillering, a greater proportion of tillers that produce grain-bearing spikes at maturity, high water-soluble carbohydrate stem reserves at anthesis, a higher proportion of competent florets at anthesis to maximise grains per spikelet leading to a high harvest index, and possibly a greater capacity to extract soil water. These results suggest a suitable ideotype for breeding high-yielding wheat cultivars with high grain weight adapted to environments with hotter, drier conditions during the post-anthesis period.

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