Key role played by mesophyll conductance in limiting carbon assimilation and transpiration of potato under soil water stress.

ABSTRACT:

Introduction

The identification of the physiological processes limiting carbon assimilation under water stress is crucial for improving model predictions and selecting drought-tolerant varieties. However, the influence of soil water availability on photosynthesis-limiting processes is still not fully understood. This study aimed to investigate the origins of photosynthesis limitations on potato (Solanum tuberosum) during a field drought experiment.

Methods

Gas exchange and chlorophyll fluorescence measurements were performed at the leaf level to determine the response of photosynthesis-limiting factors to the decrease in the relative extractable water (REW) in the soil.

Results

Drought induced a two-stage response with first a restriction of CO₂ diff

SUBMITTER: Beauclaire Q 

PROVIDER: S-EPMC11664552 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature