Evaluation of Wheat Genotypes (Triticum aestivum L.) at Grain Filling Stage for Heat Tolerance

2017 ◽  
Vol 5 (2) ◽  
pp. 971-975 ◽  
Author(s):  
Rakesh Dwivedi ◽  
Keyword(s):  
Triticum Aestivum ◽  
Heat Tolerance ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Wheat Genotypes ◽  
Filling Stage ◽  
Grain Filling Stage

scholarly journals Variation of 13C and 15N enrichments in different plant components of labeled winter wheat (Triticum aestivum L.)

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7738
Author(s):  
Zhaoan Sun ◽  
Shuxia Wu ◽  
Biao Zhu ◽  
Yiwen Zhang ◽  
Roland Bol ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
N Fertilization ◽  
Wheat Growth ◽  
Filling Stage ◽  
N Enrichment ◽  
Two Stages ◽  
Grain Filling Stage

Information on the homogeneity and distribution of 13carbon (13C) and nitrogen (15N) labeling in winter wheat (Triticum aestivum L.) is limited. We conducted a dual labeling experiment to evaluate the variability of 13C and 15N enrichment in aboveground parts of labeled winter wheat plants. Labeling with 13C and 15N was performed on non-nitrogen fertilized (−N) and nitrogen fertilized (+N, 250 kg N ha−1) plants at the elongation and grain filling stages. Aboveground parts of wheat were destructively sampled at 28 days after labeling. As winter wheat growth progressed, δ13C values of wheat ears increased significantly, whereas those of leaves and stems decreased significantly. At the elongation stage, N addition tended to reduce the aboveground δ13C values through dilution of C uptake. At the two stages, upper (newly developed) leaves were more highly enriched with 13C compared with that of lower (aged) leaves. Variability between individual wheat plants and among pots at the grain filling stage was smaller than that at the elongation stage, especially for the −N treatment. Compared with those of 13C labeling, differences in 15N excess between aboveground components (leaves and stems) under 15N labeling conditions were much smaller. We conclude that non-N fertilization and labeling at the grain filling stage may produce more uniformly 13C-labeled wheat materials, whereas the materials were more highly 13C-enriched at the elongation stage, although the δ13C values were more variable. The 15N-enriched straw tissues via urea fertilization were more uniformly labeled at the grain filling stage compared with that at the elongation stage.

scholarly journals Role of growth regulators and plant water extracts on the productivity and water use efficiency of wheat genotypes under limited water supply

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
Safdar Hussain ◽  
Abdul Rehman ◽  
Muhammad Akram ◽  
Javaid Iqbal ◽  
Tahira Batool Qaisrani ◽  
...  
Keyword(s):  
Growth Regulators ◽  
Block Design ◽  
Compatible Solutes ◽  
Water Extract ◽  
Grain Filling ◽  
Plant Water ◽  
Wheat Genotypes ◽  
Water Extracts ◽  
Filling Stage ◽  
Grain Filling Stage

Empowerment of wheat genotypes by application of growth regulators, compatible solutes and plant extracts under water restriction is an important strategy for getting sustainable yield. Field trail was performed at the research area of the Faculty of Agricultural Sciences, Ghazi University, Dera Ghazi Khan, Pakistan. Three wheat cultivars Aas-2011, Faisalabad- 2008 and Triple dwarf-1 were subjected to drought stress (skipping the irrigation at grain filling stage). The wheat genotypes were subjected to treatments viz., T1 i.e. All normal irrigation without application of abscisic acid (ABA), salicylic acid (SA), moringa (MLE) and mulberry leaf water extract (MBLE), T2­ i.e. skipping the irrigation at grain filling stage and application of 2µM ABA, T3 i.e. skipping the irrigation at grain filling stage and application of 10 m mol SA, T4 i.e. skipping the irrigation at grain filling stage and application of 15% MLE and T5 i.e. skipping the irrigation at grain filling stage and application of 10% MBLE. The experiment was laid out in Randomized Complete Block Design with factorial arrangement and repeated three times. From this study it is concluded that Aas-2011 shown best result under drought condition by applying growth regulators and plant water extracts. rs and plant water extracts.

scholarly journals Heat Waves and Broomrape Are the Major Constraints for Lentil Cultivation in Southern Spain

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1871
Author(s):  
Diego Rubiales ◽  
Ana Moral ◽  
Fernando Flores
Keyword(s):  
Seed Yield ◽  
Heat Tolerance ◽  
Significant Variation ◽  
Heat Waves ◽  
Grain Filling ◽  
Excessive Heat ◽  
Filling Stage ◽  
Complete Resistance ◽  
Low Altitude ◽  
Grain Filling Stage

There is potential for expanding lentil cultivation to dry and warm Mediterranean rain-fed environments at low altitudes, where early sowings are recommended to profit from winter rains and escape drought and excessive heat at the grain filling stage. In cooler areas, frost might be a problem in the early sowings, however, in warmer areas such as our low altitude warm southern Spanish environments the most detrimental factor on lentil seed yield appeared to be high temperatures at grain-filling stage, particularly heat waves of more than 5 days with Tmax > 30 °C. This was followed by broomrape infection, the combination of both being dramatic. We detected variation for stress tolerance, with S17 and R7 accessions outstanding for all stress indexes used, followed by S23, Nsir, S6, and S12. Broomrape infection ranked second risk in the area. No complete resistance to broomrape was identified, but there was a significant variation in the level of infection, with accessions S14 and R17 being the more resistant across environments. This offers prospects for combining heat tolerance and broomrape resistance by breeding.

scholarly journals Detrimental effects of heat stress on grain weight and quality in rice (Oryza sativa L.) are aggravated by decreased relative humidity

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11218
Author(s):  
Haoliang Yan ◽  
Chunhu Wang ◽  
Ke Liu ◽  
Xiaohai Tian
Keyword(s):  
Heat Stress ◽  
Relative Humidity ◽  
Heat Tolerance ◽  
Grain Filling ◽  
Grain Weight ◽  
Maximum Temperature ◽  
Daily Maximum Temperature ◽  
Filling Stage ◽  
Head Rice ◽  
Grain Filling Stage

There is concern over the impact of global warming on rice production due increased heat stress, coupled with decreased relative humidity (RH). It is unknown how rice yield and quality are affected by heat stress and decreased RH during the grain filling stage. We conducted experiments in controlled growth chambers on six rice cultivars, varying in heat tolerance using 12 combinative treatments of three factors: two RH levels (75% and 85%), three temperature levels (the daily maximum temperature at 33 °C, 35 °C, and 37 °C), and two durations (8 d and 15 d after anthesis). Results showed that RH75% with temperature treatments significantly reduced grain weight, which was higher than RH85%. The same trend was also observed for both head rice rate and chalkiness. R168 was the most heat-tolerant cultivar, but it still had some differences in grain weight, head rice rate, and chalkiness between the two RH regimes. The lower RH was most detrimental at 35 °C, and to a lesser extent at 33 °C, but had a negligible effect at 37 °C. Our results provide a better understanding of temperature and RH’s interaction effects on rice quality during the grain filling stage, suggesting that RH should be considered in heat tolerance screening and identification to facilitate rice breeding and genetic improvement.

scholarly journals Response of different wheat genotypes to drought and heat stresses during grain filling stage

2016 ◽  
Vol 38 (3) ◽  
pp. 369-387
Author(s):  
Sanaa I.M. Milad ◽  
Ali I. Nawar ◽  
Ahmed Shaalan ◽  
Moustafa Eldakak ◽  
Jai S. Rohila
Keyword(s):  
Grain Filling ◽  
Wheat Genotypes ◽  
Filling Stage ◽  
Grain Filling Stage
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