Efficacy of seawater salinity on osmotic adjustment and solutes allocation in wheat (Triticum aestivum) flag leaf during grain filling

2012 ◽  
Vol 4 (3) ◽  
Author(s):  
Heshmat S. Aldesuquy
Keyword(s):  
Triticum Aestivum ◽  
Osmotic Adjustment ◽  
Flag Leaf ◽  
Grain Filling ◽  
Seawater Salinity

Rate and duration of grain filling in relation to flag leaf senescence and grain yield in spring wheat (Triticum aestivum) exposed to different concentrations of ozone

2008 ◽  
Vol 110 (3) ◽  
pp. 366-375 ◽  
Author(s):  
Johanna Gelang ◽  
Håkan Pleijel ◽  
Ebe Sild ◽  
Helena Danielsson ◽  
Suhaila Younis ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Leaf Senescence ◽  
Spring Wheat ◽  
Flag Leaf ◽  
Grain Filling

scholarly journals Truncation of grain filling in wheat (Triticum aestivum) triggered by brief heat stress during early grain filling: association with senescence responses and reductions in stem reserves

2016 ◽  
Vol 43 (10) ◽  
pp. 919 ◽  
Author(s):  
Hamid Shirdelmoghanloo ◽  
Daniel Cozzolino ◽  
Iman Lohraseb ◽  
Nicholas C. Collins
Keyword(s):  
Triticum Aestivum ◽  
Grain Size ◽  
Heat Stress ◽  
Heat Waves ◽  
Flag Leaf ◽  
Grain Filling ◽  
Water Soluble ◽  
Grain Weight ◽  
Soluble Carbohydrates ◽  
Stem Reserves

Short heat waves during grain filling can reduce grain size and consequently yield in wheat (Triticum aestivum L.). Grain weight responses to heat represent the net outcome of reduced photosynthesis, increased mobilisation of stem reserves (water-soluble carbohydrates, WSC) and accelerated senescence in the grain. To compare their relative roles in grain weight responses under heat, these characteristics were monitored in nine wheat genotypes subjected to a brief heat stress at early grain filling (37°C maximum for 3 days at 10 days after anthesis). Compared with the five tolerant varieties, the four susceptible varieties showed greater heat-triggered reductions in final grain weight, grain filling duration, flag leaf chla and chlb content, stem WSC and PSII functionality (Fv/Fm). Despite the potential for reductions in sugar supply to the developing grains, there was little effect of heat on grain filling rate, suggesting that grain size effects of heat may have instead been driven by premature senescence in the grain. Extreme senescence responses potentially masked stem WSC contributions to grain weight stability. Based on these findings, limiting heat-triggered senescence in the grain may provide an appropriate focus for improving heat tolerance in wheat.

Rate and duration of grain filling in relation to flag leaf senescence and grain yield in spring wheat (Triticum aestivum) exposed to different concentrations of ozone

2000 ◽  
Vol 110 (3) ◽  
pp. 366-375 ◽  
Author(s):  
Johanna Gelang ◽  
Hakan Pleijel ◽  
Ebe Sild ◽  
Helena Danielsson ◽  
Suhaila Younis ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Leaf Senescence ◽  
Spring Wheat ◽  
Flag Leaf ◽  
Grain Filling

scholarly journals Growth and physiological performance responses to drought stress under non-flooded rice cultivation with straw mulching

2010 ◽  
Vol 56 (No. 2) ◽  
pp. 51-59 ◽  
Author(s):  
J. Qin ◽  
X. Wang ◽  
F. Hu ◽  
H. Li
Keyword(s):  
Flag Leaf ◽  
Early Period ◽  
Grain Filling ◽  
Antioxidant Enzyme Activity ◽  
Straw Mulching ◽  
Flooded Rice ◽  
Significant Difference ◽  
Rice Yields ◽  
Change Tendency ◽  
Soil Moisture Status

A field experiment was performed to investigate the growth performance and the growth stage-dependent changes in activities of antioxidative enzymes and concentration of malondialdehyde (MDA) in leaves of rice subjected to treatment with (NF-M) or without straw mulching (NF-WM) under non-flooded conditions compared with continuously flooded treatment (CF). Compared with the NF-WM treatment, mulch application significantly increased the flag leaf area per plant before heading, tillers number and plant height at the early period of tillering stage. There was no significant difference between the yield of the NF-WM and CF treatment. However, the yield of NF-WM treatment was significantly lower than CF and NF-M treatments. Significantly higher activities of peroxidase (POD) and catalase (CAT) but lower concentration of superoxide dismutase (SOD) and malondialdehyde (MDA) were observed in straw mulching treatment than in treatment without mulching at elongation, heading and grain filling stages. The change tendency of antioxidant enzyme activity and MDA level was in line both with soil moisture status and rice yields of different treatments.

Fine mapping TaFLW1, a major QTL controlling flag leaf width in bread wheat (Triticum aestivum L.)

2013 ◽  
Vol 126 (8) ◽  
pp. 1941-1949 ◽  
Author(s):  
Shulin Xue ◽  
Feng Xu ◽  
Guoqiang Li ◽  
Yan Zhou ◽  
Musen Lin ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Fine Mapping ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Leaf Width ◽  
Flag Leaf Width ◽  
Major Qtl

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.

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