Effects of temperature on some Physiological traits of Wheat

Abstract

The effect of high temperature on some physiological traits of wheat has been studied under controlled condition in a green house. The temperature stress chosen for the study were 25±1/14±10C (control) 28±1/18±10C day/night and 35±1/25±10C day/night temperature. Total crop duration was reduced under higher temperature. The results showed that leaf dry weight, shoot dry weight, flag leaf area of wheat was reduced under higher temperature. High temperature brought sterility and consequently reduced grain yield. Wheat plant grown under 35±1/25±10C, day night temperature failed to form any seed. Chlorophyll content also directly related to grain weight. High temperature reduced leaf chlorophyll content as well as grain weight. DOI: http://dx.doi.org/10.3329/jbas.v38i2.21332 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 2, 103-110, 2014

Physiological basis for yield variations in dicoccum wheat genotypes under water stress condition

“…The reduction in total dry matter production in stress condition might be due to lack of available moisture which affected the translocation of assimilates to the plant parts. Similar observations were noticed by Begum and Nessa (2014). Effect of water stress had significant effect on days to 50 per cent flowering and maturity showed significant differences among the genotypes (Table -2).…”

Performance and Stability of Promising Bread Wheat Lines for Grain Yield and Its Components

“…For example, the number of kernels/spike for late planting was significantly affected by prevailing high temperatures during the spike development phase (Singh et al 2011, Hamam et al 2015and Badr et al 2018. These results are consistent with those obtained by Begum and Nessa (2014), Mumtaz et al (2015), Uddin et al (2015), and Aglan et al (2020).…”

“…The late sowing date reduced 1000-kernel weight by 19.85% and 19.90% in the two seasons, respectively, compared with those sown on the recommended date. This reduction was due to temperature rises accompanying late sowing (Shpiler and Blum 1986, Begum and Nessa 2014and Badr et al 2018. These results are consistent with those obtained by Singh et al (2011), Uddin et al (2015) and Hamam et al (2015).…”

“…This is an exception because grain yield is considered a complex trait with low heritability; hence, it is strongly influenced by changes in environmental conditions, especially temperature. The wheat-yield increases for plants sown on the recommended date may be due to the environmental conditions being seemingly more favorable for the majority of the growth periods; consequently, plants might be more efficient in utilizing the growth factors, nutrients, water, and light, thereby resulting in better growth and higher yield potential (Begum andNessa 2014 andMum-taz et al 2015). Conversely, the reduction in grain yield associated with the delayed sowing date may be due to the wide changes in weather conditions between the two sowing dates, especially the rise in temperature during the late (reproductive) stage of plant growth, causing the forced maturity of the crop, thereby indirectly reducing yield by directly affecting various yield contributors (Shpiler andBlum 1986 andHamam et al 2015).…”