scholarly journals Morphological, Physiological, and Biochemical Characterization of Drought-Tolerant Wheat (Triticum spp.) Varieties

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Alemayehu Tefera ◽  
Mulugeta Kebede ◽  
Kassu Tadesse ◽  
Tsegaye Getahun
Keyword(s):  
Water Stress ◽  
Plant Height ◽  
Bread Wheat ◽  
Biochemical Parameters ◽  
Agricultural Research ◽  
Field Capacity ◽  
Wheat Varieties ◽  
Triticum Spp ◽  
Relative Water ◽  
Physiological And Biochemical

Wheat is one of the most important cereal crops and extensively cultivated in wide ranges of altitudes in Ethiopia. With an alarming population growth in the era of climatic change, there is a need for further crop improvement for sustainable production. In this regard, the study was carried out at the Kulumsa Agricultural Research Center (KARC) in a rainout shelter to investigate the responses of durum and bread wheat varieties to soil water stress in terms of selected morphological, physiological, and biochemical parameters. The 2 factors were combined factorially and arranged in a randomized complete block design with 3 replications. The 12 wheat varieties, 6 bread wheat and other 6 durum wheat, were sown in pots under well-watered (100% field capacity) and water-stressed (30% field capacity) conditions. Results revealed that water stress resulted in 26%, 9%, 23%, 16%, and 11% reductions in plant height, spike length, number of spikelets spike−1, relative water, and chlorophyll contents, respectively. The tested wheat varieties under water stress produced 28% and 6% more proline content and total soluble sugar, respectively, as mitigation strategies against drought. Results further exhibited that wheat varieties significantly differed in all of the measured traits except for the plant height and relative water content. The present study verified that the biochemical parameters needs to be considered as better traits to select wheat (Triticum spp.) varieties for drought tolerance under water stress conditions.

Morphological, Physiological and Biochemical Responses of Poplar Plants to Drought Stress

2018 ◽  
Vol 5 (03) ◽  
Author(s):  
ARADHNA KUMARI ◽  
IM KHAN ◽  
ANIL KUMAR SINGH ◽  
SANTOSH KUMAR SINGH
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Biochemical Parameters ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Field Capacity ◽  
Drought Event ◽  
Total Biomass ◽  
Biochemical Responses ◽  
Physiological And Biochemical

Poplar clone Kranti was selected to assess the morphological, physiological and biochemical responses under drought at different levels of water stress, as it is a common clone used to be grown in Uttarakhand for making paper and plywood. The cuttings of Populus deltoides L. (clone Kranti) were exposed to four different watering regimes (100, 75, 50 and 25% of the field capacity) and changes in physiological and biochemical parameters related with drought tolerance were recorded. Alterations in physiological (i.e. decrease in relative water content) and biochemical parameters (i.e. increase in proline and soluble sugar content and build-up of malondialdehyde by-products) occurred in all the three levels of water stress, although drought represented the major determinant. Drought treatments (75%, 50% and 25% FC) decreased plant height, radial stem diameter, harvest index, total biomass content and RWC in all the three watering regimes compared to control (100% FC). Biochemical parameters like proline, soluble sugar and MDA content increased with severity and duration of stress, which helped plants to survive under severe stress. It was analyzed that for better wood yield poplar seedlings should avail either optimum amount of water (amount nearly equal to field capacity of soil) or maximum withdrawal up to 75% of field capacity up to seedling establishment period (60 days). Furthermore, this study manifested that acclimation to drought stress is related with the rapidity, severity, and duration of the drought event of the poplar species.

scholarly journals Differential Activity of Antioxidant Enzymes and Physiological Changes in Wheat (Triticum aestivum L.) Under Drought Stress

2019 ◽  
Vol 11 (2) ◽  
pp. 266-276
Author(s):  
Kamal MIRI-HESAR ◽  
Ali DADKHODAIE ◽  
Saideh DOROSTKAR ◽  
Bahram HEIDARI
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Field Capacity ◽  
Triticum Aestivum L ◽  
Plant Production ◽  
Breeding Programs ◽  
Drought Tolerant ◽  
Severe Water Stress ◽  
Significant Difference ◽  
Relative Water

Drought stress is one of the most significant environmental factors restricting plant production all over the world. In arid and semi-arid regions where drought often causes serious problems, wheat is usually grown as a major crop and faces water stress. In order to study drought tolerance of wheat, an experiment with 34 genotypes including 11 local and commercial cultivars, 17 landraces, and six genotypes from International Maize and Wheat Improvement Center (CIMMYT) was conducted at the experimental station, School of Agriculture, Shiraz University, Iran in 2010-2011 growing season. Three different irrigation regimes (100%, 75% and 50% Field Capacity) were applied and physiological and biochemical traits were measured for which a significant difference was observed in genotypes. Under severe water stress, proline content and enzymes’ activities increased while the relative water content (RWC) and chlorophyll index decreased significantly in all genotypes. Of these indices, superoxide dismutase (SOD) and RWC were able to distinguish tolerant genotypes from sensitives. Moreover, yield index (YI) was useful in detecting tolerant genotypes. The drought susceptibility index (DSI) varied from 0.40 to 1.71 in genotypes. These results indicated that drought-tolerant genotypes could be selected based on high YI, RWC and SOD and low DSI. On the whole, the genotypes 31 (30ESWYT200), 29 (30ESWYT173) and 25 (Akbari) were identified to be tolerant and could be further used in downstream breeding programs for the improvement of wheat tolerance under water limited conditions.

Effect of Growth Stage and Water Stress on Barnyardgrass (Echinochloa crus-galli) Control and on Glyphosate Absorption and Translocation

Weed Science ◽  
1980 ◽  
Vol 28 (3) ◽  
pp. 277-282 ◽  
Author(s):  
M. S. Ahmadi ◽  
L. C. Haderlie ◽  
G. A. Wicks
Keyword(s):  
Soil Moisture ◽  
Water Stress ◽  
Plant Height ◽  
Growth Stage ◽  
Field Capacity ◽  
Stress Studies ◽  
Herbicide Treatments ◽  
Additional Reduction

Under greenhouse conditions, postemergence herbicide effectiveness was greater when barnyardgrass [Echinochloa crus-galli(L.) Beauv.] plants were 5-or 10-cm tall as compared to 15-or 20-cm tall. Absorption of14C-glyphosate [N-(phosphonomethyl)glycine] decreased from 58% of applied to 47% as plant height increased from 5 to 15 cm, and an additional reduction (to 32% of applied at 5 cm) occurred when terbutryn [2-(tert-butylamino)-4-(ethylamino)-6-(methylthio)-s-triazine] was added to glyphosate. Translocation of14C-glyphosate was reduced in older plants or when terbutryn was added to glyphosate. Water stress studies included soil moisture levels of 10, 20, 30, and 40% moisture (PW). Herbicide treatments were less effective at soil moisture levels below field capacity (30 PW). When soil moisture was 10 PW (-37 bar) absorption of14C-glyphosate was greatly reduced in plants treated at both 7.5-and 15-cm heights with or without terbutryn. At 10 PW only 15 to 20% of applied14C was absorbed whereas at 40 PW, absorption was over 45% and 62% with and without terbutryn, respectively. The addition of terbutryn to glyphosate resulted in decreased translocation for all soil moisture levels except the 20 PW treatment at the 15-cm height. Translocation of14C was greatly reduced for plants in soils at 10 PW for both herbicide treatments.

PARTICIPATORY EVALUATION OF THE PERFORMANCE OF SOME IMPROVED BREAD WHEAT (TRITICUM AESTIVUM) VARIETIES IN THE JIJIGA PLAINS OF EASTERN ETHIOPIA

2003 ◽  
Vol 40 (1) ◽  
pp. 89-97 ◽  
Author(s):  
TERIESSA JALLETA
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Local Control ◽  
Management Practices ◽  
Agricultural Research ◽  
Participatory Evaluation ◽  
Preference Ranking ◽  
Wheat Varieties ◽  
Eastern Ethiopia ◽  
Improved Varieties

Through years of research, the Ethiopian Agricultural Research Organization has recommended a number of improved bread-wheat varieties for production in the different climatic zones, along with accompanying technology packages. In areas such as the Jijiga plains, however, adoption of these varieties by the farmers has been very limited. The principal objective of the study was, therefore, to investigate the reasons why farmers are reluctant to adopt high-yielding improved wheat varieties, and to identify farmers' preferences. An assessment study followed by participatory evaluation of the performance of five improved bread-wheat (Triticum aestivum) varieties and a local control was carried out under farmers' management practices. The trial was conducted at 10 locations (across three districts) on the Jijiga plains for two consecutive years (the 1999 and 2000 cropping seasons) and involved 30 farmers. Farmers' preferred varieties were identified using preference ranking. The results showed that farmers refrained from the adoption of some ‘improved’ varieties of bread wheat that were provided through the extension services because the varieties performed poorly under farmers' conditions. The study also showed that farmers do have multiple criteria for evaluating the varieties apart from yield, though the latter was the major parameter for recommending and releasing varieties for multi-locations. Farmers identified earliness, yield, and quality as the main criteria for adoption of wheat varieties. Accordingly, variety HAR-710 stood first in terms of yield (2.56 t ha−1) and other parameters, followed by PAVON -76 (2.49 t ha−1). Though its grain yield was relatively lower than the improved ones, the local control was preferred to some improved varieties used in this study for other quality parameters. The study highlighted the need for re-orienting agricultural research towards involving farmers at the appropriate stages of technology identification.

Responses of young plants of Vachellia farnesiana to drought

2020 ◽  
Vol 68 (8) ◽  
pp. 587 ◽  
Author(s):  
Josiane Moura ◽  
Evandro A. Vieira
Keyword(s):  
Water Deficit ◽  
Field Capacity ◽  
Carotenoid Content ◽  
Simultaneous Increase ◽  
Growth Responses ◽  
Chlorophylls A And B ◽  
Relative Water ◽  
Phosphorus And Potassium ◽  
Environment Experiment ◽  
Physiological And Biochemical

Water availability in soil modulates plant acclimatisation responses in different habitats. In this study, we evaluated the effect of water deficit on the physiological, biochemical and growth responses of Vachellia farnesiana. Open environment experiment was conducted during 90 days and two conditions of hydration were tested: full hydration (H) and water deficit (WD) at 25% of field capacity. The relative water content (RWC) of the leaves under WD showed a 30.2% decrease (P < 0.01), compared with the hydrated plants at 30 days. A decrease in the RWC led to decrease in the osmotic potential (Ψs), quantum yield of PSII (Fv/Fm) and lesser content of chlorophylls a and b under WD. A greater carotenoid content and simultaneous increase in the content of proline, H2O2 and phenolic compounds of the leaves was also observed in WD. Water deficit also promoted differences in the nitrogen, phosphorus, and potassium content of the leaves when compared with hydrated plants. Although they showed growth deficit, plants of V. farnesiana demonstrated resistance to WD through physiological and biochemical adjustments.

GENOTYPIC AND PHENOTYPIC VARIABILITY, HERITABILITY AND PHENOTYPIC CORRELATION FOR YIELD AND YIELD COMPONENTS IN BREAD WHEAT VARIETIES

2001 ◽  
Vol 49 (3) ◽  
pp. 237-242 ◽  
Author(s):  
K. Z. Korkut ◽  
I. BAŞER ◽  
O. Bilgin
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Bread Wheat ◽  
Yield Components ◽  
Phenotypic Variability ◽  
Kernel Weight ◽  
Phenotypic Correlation ◽  
Genotypic Variability ◽  
Wheat Varieties ◽  
Yield And Yield Components

This research was conducted to determine the effect of genetic and phenotypic variability on the yield and yield components of some bread wheat varieties over a period of four years (1995–1998). Experiments were established according to a completely randomised block design with three replicates in the Experimental Field of Tekirda đ Agricultural Faculty, Thrace University. In the present research, genotypic and phenotypic variability, heritability and phenotypic correlation coefficients were estimated for plant height, spike length, number of spikelets per spike, number of spikes per square metre, thousand kernel weight, test weight and grain yield per hectare. The results of data analyses showed that the highest genotypic variability was obtained for per hectare yield, whereas the highest phenotypic variability values were found for plant height, thousand kernel weight and grain yield. For plant height, thousand grain yield and test weight, the broad sense heritability coefficient was found to be the highest, while it was low for spike length, number of spikelets per spike and number of Key words: bread wheat, genotypic variability, phenotypic variability, heritability coefficient, phenotypic correlation, grain yield

scholarly journals Estimation of grain productivity and biochemical indicators of the winter bread wheat varieties depending on the forecrop

2021 ◽  
Vol 273 ◽  
pp. 01027
Author(s):  
Оlesya Nekrasova ◽  
Nina Kravchenko ◽  
Dmitry Marchenko ◽  
Evgeny Nekrasov
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Agricultural Research ◽  
Triticum Aestivum L ◽  
Wheat Breeding ◽  
Wheat Varieties ◽  
Biochemical Indicators ◽  
Winter Bread Wheat ◽  
Grain Productivity ◽  
Study Results

The purpose of the study was to estimate the effect of sunflower and pea on the amount of productivity, protein and gluten percentage in grain. The objects of the study were 13 winter bread wheat varieties (Triticum aestivum L.) developed by the Agricultural Research Center “Donskoy”. The study was carried out in 2018-2020 on the fields of the department of winter wheat breeding and seed production. The forecrops were peas and sunflower. The study results showed that the varieties ‘Volny Don’ (6.1 t / ha), ‘Krasa Dona’ (6.1 t / ha) and ‘Lidiya’ (6.0 t / ha), when sown after peas, gave the largest yields. The varieties ‘Volny Don’ (4.9 t / ha) and ‘Polina’ (4.8 t / ha) which were sown after sunflower, showed the best productivity. The analysis of qualitative indicators established that the maximum percentage of protein and gluten in grain was identified in the varieties ‘Podarok Krymu’ (16.3%; 28.3%) and ‘Volnitsa’ (16.1%; 28.5%), which were sown after peas; and the same varieties showed good results (‘Podarok Krymu’ (16.2%; 27.4%) and ‘Volnitsa’ (15.7%; 27.8%)), when sown after sunflower.

scholarly journals Effect of pattern of water supply on Vicia faba L. 3. Plant water relations, expansive growth and stomatal reactions.

1991 ◽  
Vol 39 (4) ◽  
pp. 247-262 ◽  
Author(s):  
C. Grashoff ◽  
D.R. Verkerke
Keyword(s):  
Water Stress ◽  
Stomatal Conductance ◽  
Water Supply ◽  
Near Field ◽  
Maximum Level ◽  
Field Capacity ◽  
Relative Water ◽  
Faba Beans ◽  
Rate Of Photosynthesis ◽  
Negative Exponential

Faba beans cv. Minica, Wierboon, Kristall, Felix, Optica and Alfred grown in the field in the Netherlands were irrigated to near field capacity, or water stressed, between the onset of flowering and the end of the growing season. Leaf water potential ( psi ), osmotic potential ( pi ) and turgor (P) were linearly related to leaf relative water content (RWC) with no significant differences between cultivars. At full turgor, pi hardly differed between water supply treatments, and the slopes of pi vs. RWC were not significantly different between treatments, indicating the absence of osmotic adjustment. Water supply did not affect the slope of P vs. RWC, and it was concluded that the faba bean cultivars lacked mechanisms to keep P high during water stress. Internode growth during flowering was 2-3 times greater in the well watered than in the stressed treatment. In greenhouse studies with cv. Minica, vegetative growth decreased linearly with decreasing P. Maximum stomatal conductance in the field decreased with psi from an estimated maximum level of 1.0 s/cm (at full turgidity and light intensity >800 micro E/msuperscript 2 per s), following a negative exponential curve. It was concluded that vegetative (expansive) growth decreases faster with decreasing P or psi than the stomatal conductance (and most probably faster than the rate of photosynthesis). It is suggested that this result may help to explain the positive effect of mild water stress on reproductive growth in faba beans. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals The role of the upper leaves in the formation of productivity and its elements in the varieties and lines of winter bread wheat of intensive type

2020 ◽  
pp. 16-20
Author(s):  
V. L. Gaze ◽  
E. V. Ionova ◽  
V. A. Likhovidova ◽  
O. V. Skripka
Keyword(s):  
Bread Wheat ◽  
Agricultural Research ◽  
Kernel Weight ◽  
Wheat Varieties ◽  
Winter Bread Wheat ◽  
Study Results ◽  
Head Formation ◽  
Moisture Supply ◽  
Photosynthesis Efficiency ◽  
Productive Systems

The current paper has presented the study results on estimating the effect of the upper leaves’ area of winter bread wheat samples on productivity and its elements. There have been tested nine winter bread wheat varieties of intensive type developed in the FSBSI “Agricultural Research Center “Donskoy”. The current study has identified that the largest upper leaves’ area under insufficient moisture supply during the periods of head formation and flowering was produced by the variety “Etyud” (31 cm2 in a heading period; 29.4 cm2 in a flowering period). During the period of milky kernel ripening, the variety “Shef” has also shown the largest upper leaves’ area under insufficient moisture supply (17.7 cm2). The variety “Yubiley Dona” has shown a minimal decrease in the upper leaves area to milky kernel ripeness (40%). The evaluation results of productivity and its structure have shown that the largest value of the number of productive stems per 1 m2 in arid conditions was identified in the varieties “Etyud” (261 pcs.) and “Shef” (254 pcs.). According to the number of kernels per main head, the variety “Donskaya Step” was the best with 32 pcs. Large kernel weight per main head was identified in the varieties “Donskaya Step” (0.72 g), “Shef” and “Etyud” (0.67 g), and according to 1000 kernel weight the varieties “Etyud” (25.9 g) and “Zodiak” (25.2 g) were the best ones. The varieties “Etyud” (163.7 g/m2) and “Shef” (168.6 g/m2) have produced the maximum yields, that means the best functioning of all productive systems of winter bread wheat. The estimation of the samples according to the correlation between photosynthesis efficiency of the upper leaves’ area and kernel percentage (ZFL) has identified the samples “Donskaya Step”, “1005/14”, “Univer”. According to the correlation between photosynthesis efficiency of the upper leaves’ area and kernel weight per head (MFFL) the variety “Donskaya Step” showed the best results. The conducted study ad obtained results made it possible to identify the varieties “Shef”, “Etyud” and “Donskaya Step”. The identified varieties have been proposed for further use in the breeding process.

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