High temperature and water deficit may reduce seed number in field pea purely by decreasing plant growth rate

Functional Plant Biology : FPB
Lydie GuilioniJérémie Lecoeur

Abstract

Seed number, the most variable yield component of legumes is strongly affected by heat stress (HS) and water deficit (WD). The objective of this paper is to investigate whether HS and WD reduced seed number in field pea through their negative effects on biomass production rather than by specific effects on the developing reproductive organs. Several field and glasshouse experiments were carried out in southern France, in which HS and / or WD of various intensities, durations and positions in the plant lifecycle were imposed on several pea cultivars. WD and HS reduced seed number, in an intensity-dependent manner. They also changed the distribution of seeds along the stem. Plants subjected to WD and mild HS had more seeds on the basal phytomers than did control plants, making it possible to exclude direct effects of stress on seed development. In contrast, severe HS resulted in the immediate abortion of reproductive organs. WD and HS also decreased net photosynthesis (Pn), but only during the period of constraint. Quantitative relationships between Pn and soil water status and between Pn and leaf temperature were established. Nevertheless, in all cases there was a single linear relationship between final seed number and plant gr...Continue Reading

Citations

Dec 31, 2019·Plant, Cell & Environment·Marion PrudentPierre-Alain Maron
Jul 31, 2007·Plant, Cell & Environment·Alison M Smith, Mark Stitt
Dec 6, 2011·Omics : a Journal of Integrative Biology·Katalin Magyar-TáboriJudit Dobránszki
Aug 26, 2015·Journal of the Science of Food and Agriculture·Muhammad R ShaheenEjaz A Waraich
Jun 18, 2015·Plant, Cell & Environment·Yunfei JiangRosalind A Bueckert
Mar 21, 2020·International Journal of Molecular Sciences·Endale G TafesseThomas D Warkentin
Sep 30, 2021·Environmental Science and Pollution Research International·Khalid Rehman HakeemRouf Ahmad Bhat

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