Paraquat influences development and efficacy of the mycorrhizal fungus Glomus fasciculatus

1981 ◽  
Vol 59 (4) ◽  
pp. 518-521 ◽  
Author(s):  
P. E. Pope ◽  
H. A. Holt
Keyword(s):  
Chemical Treatment ◽  
Mycorrhizal Fungus ◽  
Dry Weight ◽  
Seedling Height ◽  
Stem Height ◽  
White Ash ◽  
P Concentration ◽  
Glomus Fasciculatus ◽  
Total Dry Weight ◽  
Mycorrhizal Hyphae

Paraquat (1,1-dimethyl-4,4′-bipyridinium chloride) applied at 2 kg/ha significantly reduced the amount of mycorrhizal hyphae and number of vesicles and chlamydospores formed by Glomus fasciculatus (Thaxt.) Gerd. and Trappe when compared with the control or the 0.5 kg/ha paraquat treatment. When compared with inoculated control, paraquat applied at 0.5 kg/ha tended to increase the amount of mycorrhizal hyphae, and significantly increased chlamydospore production. For noninoculated white ash (Fraxinus americana L.) seedlings, total dry weight and stem height tended to decrease with increases in rates of paraquat applied. In contrast, seedling height and foliar P concentration of inoculated seedlings tended to be greatest for the 0.5 kg/ha paraquat treatment followed by the control and the 2 kg/ha chemical treatment. The amount of mycorrhizal hyphae was significantly correlated to seedling height and diameter, total dry weight, and percentage foliar elemental P.

Influence of Glomus fasciculatus mycorrhizae on some physical and chemical characteristics of Platanus occidentalis seedlings

1980 ◽  
Vol 58 (14) ◽  
pp. 1601-1606 ◽  
Author(s):  
P. E. Pope
Keyword(s):  
Root Colonization ◽  
Dry Weight ◽  
Nutrient Concentrations ◽  
Nutrient Level ◽  
Soil P ◽  
Platanus Occidentalis ◽  
P Concentration ◽  
Glomus Fasciculatus ◽  
Foliar Phosphorus ◽  
Total Dry Weight

Inoculation of Platanus occidentalis seedlings with Glomus fasciculatus significantly increased plant dry weight and foliar phosphorus (P) concentration when compared with the uninoculated control. After 12 weeks inoculated seedlings were 73% taller and 200% greater in total dry weight. The largest dry weight increase was recorded for foliage (212%) followed in order by stem (202%) and root (171%). Averaged overall nutrient treatments, foliar P concentration was 22% greater for the inoculated seedlings. Nutrient regimes representing 1×, 2×, and 4× Hoagland's No. 2 solution and a control significantly influenced seedling height, dry weight, percentage of foliar N, P, and K, and the degree of root colonization. Maximum growth and foliar nutrient concentrations were associated with the 2× Hoagland's nutrient regime followed in order by the 4× and 1× nutrient treatments and the control. Degree of root colonization by G. fasciculatus increased from 42% of the root length in the unfertilized control to 48% at the 1× Hoagland's regime and sharply declined at the 2× and 4× levels. Total dry weight of inoculated seedlings was significantly greater than the noninoculated control at each nutrient level. Incremental differences were 2.71, 4.03, 4.37, and 3.08 g for the control, 1×, 2×, and 4× Hoagland's nutrient regimes, respectively. Seedling growth attributed to G. fasciculatus is directly related to degree of mycorrhizal colonization and inversely related to the amount of extractable soil P.

scholarly journals Improved tolerance of wheat plants (Triticum aestivum L.) to drought stress and rewatering by the arbuscular mycorrhizal fungus Glomus claroideum: effect on growth and cell membrane stability

2008 ◽  
Vol 20 (1) ◽  
pp. 29-37 ◽  
Author(s):  
José Beltrano ◽  
Marta G. Ronco
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Dry Weight ◽  
Leaf Chlorophyll ◽  
Severe Water Stress ◽  
Relative Water ◽  
Mycorrhizal Plants ◽  
Total Dry Weight

The aim of this paper was to investigate the contribution of the arbuscular mycorrhizal fungus Glomus claroideum to drought stress tolerance in wheat plants grown under controlled conditions in a growth chamber, and subjected to moderate or severe water stress and rewatering. Water stress tolerance was determined through total dry weight, leaf relative water content, leakage of solutes and leaf chlorophyll and protein concentrations in mycorrhizal and non-mycorrhizal wheat plants. Total dry weight and leaf chlorophyll concentrations were significantly higher in mycorrhizal plants after moderate or severe water stress treatments compared with non-mycorrhizal ones. Electrolyte leakage was significantly lower in water-stressed inoculated plants. Compared to non-inoculated plants, leaf relative water content and total protein concentration of inoculated individuals increased only under severe water stress. When irrigation was re-established, mycorrhizal plants increased their total dry weight and leaf chlorophyll concentration, and recovered cell membrane permeability in leaves compared with non-mycorrhizal plants. In conclusion, root colonization by G. claroideum could be an adequate strategy to alleviate the deleterious effects of drought stress and retard the senescence syndrome in wheat.

scholarly journals Plant growth and phosphorus uptake in mycorrhizal rangpur lime seedlings under different levels of phosphorus

2006 ◽  
Vol 41 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Marco Antonio Nogueira ◽  
Elke Jurandy Bran Nogueira Cardoso
Keyword(s):  
Plant Growth ◽  
Glomus Intraradices ◽  
Root Colonization ◽  
Dry Weight ◽  
P Uptake ◽  
Rangpur Lime ◽  
P Concentration ◽  
External Mycelium ◽  
Mycorrhizal Plants ◽  
Total Dry Weight

The objective of this work was to evaluate the response of rangpur lime (Citrus limonia) to arbuscular mycorrhiza (Glomus intraradices), under P levels ranging from low to excessive. Plants were grown in three levels of soluble P (25, 200 and 1,000 mg kg-1), either inoculated with Glomus intraradices or left noninoculated, evaluated at 30, 60, 90, 120 and 150 days after transplanting (DAT). Total dry weight, shoot P concentration and specific P uptake by roots increased in mycorrhizal plants with the doses of 25 and 200 mg kg-1 P at 90 DAT. With 1,000 mg kg-1 P, mycorrhizal plants had a transient growth depression at 90 and 120 DAT, and nonmycorrhizal effects on P uptake at any harvesting period. Root colonization and total external mycelium correlated positively with shoot P concentration and total dry weight at the two lowest P levels. Although the highest P level decreased root colonization, it did not affect total external mycelium to the same extent. As a result, a P availability imbalance affected negatively the mycorrhizal symbiosis and, consequently, the plant growth.

Effects of salinity on the germination and seedling characteristics of cowpea [Vigna unguiculata (L.) Walp.]

2000 ◽  
Vol 40 (3) ◽  
pp. 433 ◽  
Author(s):  
E. Troyo-Diéguez ◽  
B. Murillo-Amador
Keyword(s):  
Leaf Area ◽  
Vigna Unguiculata ◽  
Dry Weight ◽  
Shoot Length ◽  
Low Fertility ◽  
Arid Zones ◽  
Stem Height ◽  
Wide Adaptation ◽  
Total Dry Weight ◽  
Saline Solutions

Cowpea [Vigna unguiculata (L.) Walp.], a species with wide adaptation in arid and semi-arid zones, is grown from green seeds and pods, and is tolerant to salinity. It is a hardy species capable of developing in soils of low fertility. In this study, the effects of different salinities and different submersion times on the germination and weight of seeds of cowpea treated previously were evaluated. The effect of irrigation with saline solutions on seedling shoot length and dry weight, stem height and dry weight, total dry weight, and leaf area was also studied. The results show that the weight of pre-treated seeds decreases linearly when submersion times were increased. Germination decreased quadratically when submersion times and salinity increased. Seedling total dry weight, leaf area, shoot length and dry weight, stem height and dry weight all decreased quadratically significantly when salinity increased.

scholarly journals Effects of nanoparticle treatments on propagation of Prunus mahaleb L. by seed

2017 ◽  
Vol 63 (No. 9) ◽  
pp. 408-416
Author(s):  
Goodarzi Gholam Reza ◽  
Noor Vahide Payam ◽  
Ahmadloo Fatemeh
Keyword(s):  
Water Content ◽  
Relative Water Content ◽  
Field Capacity ◽  
Dry Weight ◽  
Germination Percentage ◽  
Suitable Method ◽  
Seedling Height ◽  
Prunus Mahaleb ◽  
Relative Water ◽  
Total Dry Weight

We examined the effects of nanoparticles (NPs) of TiO<sub>2</sub> and ZnO at 0.5, 1, 2 or 3% concentrations for 10, 20, and 30 min in stratified seeds of Prunus mahaleb Linnaeus. Then, seedlings produced were irrigated to field capacity with NP solutions at control, 1, 5, and 10% concentration for 7 months in the greenhouse conditions. Treating seeds at 1% concentrations of TiO<sub>2</sub>-NPs for 20 min resulted in the highest germination percentage (65%) and at concentrations of 3% for 30 min it showed the lowest germination percentage (13%). The highest total seedling height was obtained after exposure of seeds to 0.5% TiO<sub>2</sub>-NPs for 10 min. Irrigation of seedlings with TiO<sub>2</sub>-NPs at the concentration of 1% seems to be a suitable method how to increase their total height, survival, and total dry weight. A decrease in the relative water content and an increase in proline were observed in response to the application of high levels of NPs.

scholarly journals Perkecambahan dan Pertumbuhan Awal Budset dan Budchip Tebu (Saccharum officinarum L.) yang Ditanam pada Berbagai Posisi Mata Tunas

2020 ◽  
Vol 8 (3) ◽  
pp. 435
Author(s):  
Rivandi Pranandita Putra
Keyword(s):  
Dry Weight ◽  
Saccharum Officinarum ◽  
Early Growth ◽  
Stem Height ◽  
Shoot Ratio ◽  
Root Shoot Ratio ◽  
Number Of Leaves ◽  
Bud Position ◽  
Total Dry Weight ◽  
Bud Chip

Germination phase is a crucial stage in the cultivation of sugarcane. This phase is influenced by numerous factors, such as the position of bud when the sugarcane seed is planted. This study aims to examine the responses of germination and early growth of sugarcane bud chip and budset seeds variety PS 862 that are grown in various bud positions, namely upward, downward, and side positions. Results explicated that there were significant differences in the seed germination that are grown with various bud positions. Seeds that are planted with a downward bud position germinate slower than the two other bud positions. However, the percentage of germination of all treatments were classified as vigorous since the numbers are more than 80%. There was a strong influence of the bud position on the number of tillers and root/shoot ratio. Seeds that are planted with upward and side bud position have more tillers than seeds grown with the two other positions. The root/shoot ratio was higher in seeds grown with upward positions than the other positions. Meanwhile, there were no significant effects of bud positions and the form of seed on plant and stem height, the number of leaves, as well as root, shoot, and total dry weight of the crop.

BIOASSAY OF PROLACTIN

1969 ◽  
Vol 60 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Charles S. Nicoll
Keyword(s):  
Epithelial Cells ◽  
Lipid Content ◽  
Dry Weight ◽  
Fat Content ◽  
Assay Sensitivity ◽  
Mucosal Epithelium ◽  
Wet Weight ◽  
Total Dry Weight

ABSTRACT The response of the pigeon crop-sac to systemically acting prolactin (injected subcutaneously) was evaluated by measuring the wet weight of the responsive lateral lobes of the organ and by determining the dry weight of a 4 cm diameter disc of mucosal epithelium taken from one hemicrop. Of several different injection schedules tested, administration of prolactin in four daily injections was found to yield optimal responses. When compared with a graded series of prolactin doses, measurement of the mucosal dry weight proved to be a better method of response quantification than determination of the crop-sac wet weight with respect to both assay sensitivity and precision. The submucosal tissue of the crop-sac was estimated to constitute about 64 % of the total dry weight of the unstimulated organ and it was found to be relatively unresponsive to prolactin stimulation in comparison with the mucosa. The lipid content of the mucosal epithelium was determined using unstimulated crop-sacs or tissues which showed varying degrees of prolactin-induced proliferation. The fat content of the mucosal epithelial cells increased only slightly more rapidly than the dry weight or the defatted dry weight of the mucosa. Suggestions are made for the further improvement of the systemic crop-sac assay for prolactin.

Impact of an Open Trellis on Canopy Growth, Light Interception, Yield, and Leaf Physiology of Red Raspberry (Rubus idaeus)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 468b-468
Author(s):  
Stephen F. Klauer ◽  
J. Scott Cameron ◽  
Chuhe Chen
Keyword(s):  
Leaf Area ◽  
Total Nitrogen ◽  
Dry Weight ◽  
Light Interception ◽  
Rubus Idaeus ◽  
Above Ground Biomass ◽  
Red Raspberry ◽  
Leaf Physiology ◽  
Total Dry Weight ◽  
Upper Third

After promising results were obtained with an open-style split trellis (two top wires) in its initial year, two new trials were established in 1997 in northwest (Lynden) and southwest (Woodland) Washington. For the split trellis, actual yields were 33% (machine-picked 1/2 season) and 17% (hand-picked) greater, respectively, for the two locations compared to the conventional trellis (one top wire). In Woodland, canes from the split trellis had 33% more berries, 55% more laterals, 69% more leaves, and 25% greater leaf area compared with the conventional trellis. Greatest enhancement of these components was in the upper third of the canopy. Laterals were also shorter in this area of the split canopy, but there was no difference in average total length of lateral/cane between trellis types. Total dry weight/cane was 22% greater in the split trellis, but component partitioning/cane was consistent between the two systems with fruit + laterals (43%) having the greatest above-ground biomass, followed by the stem (30% to 33%) and the leaves (21% to 22%). Measurement of canopy width, circumference, and light interception showed that the split-trellis canopy filled in more quickly, and was larger from preanthesis through postharvest. Light interception near the top of the split canopy was 30% greater 1 month before harvest with 98% interception near the top and middle of that canopy. There was no difference between the trellis types in leaf CO2 assimilation, spectra, or fluorescence through the fruiting season, or in total nitrogen of postharvest primocane leaves.

scholarly journals Thermo-Chemical Treatment for Carcass Disposal and the Application of Treated Carcass as Compost

2021 ◽  
Vol 11 (1) ◽  
pp. 431
Author(s):  
Jae-In Lee ◽  
Eun-Ji Cho ◽  
Fritz Ndumbe Lyonga ◽  
Chang-Hee Lee ◽  
Sue-Yun Hwang ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Dry Weight ◽  
Heavy Metal Concentration ◽  
Leaf Length ◽  
Air Pollutant ◽  
Germination Index ◽  
Pollutant Emission ◽  
Reinforced Plastic ◽  
Korean Ministry ◽  
Index Value

A mechanized thermo-chemical treatment system was developed to treat the undecomposed carcass and remediate livestock burial sites. Animal carcasses were thus processed via crushing, mixing, and treatment with quicklime treatment, heat treatment (200–500 °C), and mixing with sawdust. The machinery was applied to two sites where 16,000 chickens and 418 pigs had previously been buried in fiber-reinforced plastic storage bins. No dioxins were detected in the gas discharged during processing, and the concentration of total volatile organic compound, toluene, ethylbenzene, xylene, and styrene were 430.3, 139.0, 18.3, 21.4, and 10.4 μg/m3, respectively, which were below the air pollutant emission standards issued by the Korean Ministry of Environment. Korean standards stipulating the use of treated carcasses as compost (C, N, and P content, heavy metal concentration, Escherichia coli, and Salmonella) were met, but the germination index value was less than 70, not satisfying the criteria. Plant height, leaf length, leaf width, and dry weight of lettuce grown in soil amended with treated carcass product were significantly lower than those grown in low nutrient soil due to the poor germination index of the treated carcass. These results indicate that a composting process is required before the use of the treated carcass as a fertilizer. The addition of zeolite retarded the elution of ammonia from the carcasses and its efficiency was about 87.9%. It is expected that the mechanized thermo-chemical treatment process developed in this study could replace other technologies for the remediation of livestock burial sites.

scholarly journals Impact of Different Water Management Regimes on the Growth, Productivity, and Resource Use Efficiency of Dry Direct Seeded Rice in Central Punjab-Pakistan

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1151
Author(s):  
Sadam Hussain ◽  
Saddam Hussain ◽  
Zubair Aslam ◽  
Muhammad Rafiq ◽  
Adeel Abbas ◽  
...  
Keyword(s):  
Grain Yield ◽  
Hybrid Rice ◽  
Water Productivity ◽  
Dry Weight ◽  
Cost Ratio ◽  
Yield Attributes ◽  
Benefit Cost Ratio ◽  
Direct Seeded ◽  
Total Dry Weight ◽  
Benefit Cost

Dry direct-seeded rice has been shown to save irrigation water and labor. Nonetheless, irrigation management in dry direct-seeded rice has received very little attention. Here, we examined the potential of different irrigation regimes: aerobic rice (AR), alternate wetting and drying (AWD) and continuous flooding (CF) in dry direct-seeded rice cultivation on two rice cultivars (Pride-1 (hybrid indica) and NB-1 (inbred indica)). Growth, yield attributes, grain yield, total water input, water productivity and benefit cost ratio were measured. Our results showed that AR saved 11.22 and 28.40%, and 5.72 and 32.98% water compared with AWD and CF during 2018 and 2020, respectively. There was a significant difference in grain yield among treatments and cultivars. AWD and CF produced statistically same total dry weight and grain yield, while AR reduced the total dry weight by 31.34% and 38.04% and grain yield by 34.82% and 38.16% in comparison to AWD and CF, respectively, across the years. Except for 1000-grain weight and harvest index in AWD and CF, further differences in total dry weight and grain yield among irrigation treatments were primarily correlated with variations in yield attributes. Among the cultivars, hybrid rice performed better than inbred rice. Over the two-year period, hybrid rice increased total dry weight, grain yield, and water productivity by 9.28%, 13.05%, and 14.28%, respectively, as compared to inbred rice. Regarding water productivity (WP), the maximum percentage (40.90 and 26.53%) was recorded for AWD compared to AR and CF. Among cultivars, more water productivity (14.28%) was calculated for hybrid rice than inbred one. Chlorophyll and carotenoid contents, leaf area index and crop growth rate contributed to higher grain yield of hybrid rice under AWD and CF. In contrast to WP, the maximum benefit cost ratio was estimated to be higher for CF than that of AR and AWD. For the cultivars, the maximum value (2.26 in 2018 and 2.32 in 2020) was calculated for hybrid rice compared with the inbred one. In conclusion, these results suggests that AWD with maximum WP and CF with maximum BCR could be more efficient approaches than AR. Under CF, hybrid rice cultivars with higher yield and yield-related attributes, WP and BCR performed better.

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