Effects of high temperature stress during anthesis and grain filling periods on photosynthesis, lipids and grain yield in wheat.

BMC Plant Biology
Maduraimuthu DjanaguiramanP V V Prasad

Abstract

Short episodes of high temperature (HT) stress during reproductive stages of development cause significant yield losses in wheat (Triticum aestivum L.). Two independent experiments were conducted to quantify the effects of HT during anthesis and grain filling periods on photosynthesis, leaf lipidome, and yield traits in wheat. In experiment I, wheat genotype Seri82 was exposed to optimum temperature (OT; 22/14 °C; day/night) or HT (32/22 °C) for 14 d during anthesis stage. In experiment II, the plants were exposed to OT or HT for 14 d during the grain filling stage. During the HT stress, chlorophyll index, thylakoid membrane damage, stomatal conductance, photosynthetic rate and leaf lipid composition were measured. At maturity, grain yield and its components were quantified. HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively) and grain yield plant- 1 (29 and 44%, respectively), and increased thylakoid membrane damage (61 and 68%, respectively) compared to their respective control (OT). HT stress during anthesis or grain filling stage increased the molar percentage of less unsaturated lipid species [36:5- monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGD...Continue Reading

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Citations

Nov 20, 2020·Natural Product Research·Seham S El HawaryEngy A Mahrous
Sep 21, 2021·Plant Cell Reports·Milan Kumar LalGaurav Zinta
Nov 21, 2021·Journal of Applied Microbiology·Om Parkash AhlawatGyanendra Singh

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