Photosynthetic induction responses of two Leymus chinensis ecotypes under drought stress.

ABSTRACT: Drought often alters both steady-state photosynthesis and photosynthetic induction, yet their joint responses within species remain incompletely described. Here, we examined photosynthetic and stomatal responses of two ecotypes (gray-green, GG; yellow-green, YG) of Leymus chinensis to a step increase in irradiance under contrasting soil moisture conditions. For both ecotypes, experimentally imposed drought (three soil water content levels: well-watered 60-75%, moderate drought ~ 35-50%, severe drought ~ 10-25% v/v; 60 d) reduced steady-state photosynthetic rate and prolonged photosynthetic induction. The GG ecotype showed faster stomatal responses and higher cumulative carbon gain during light induction than the YG ecotype. Specifically, GG exhibited a faster Rubisco activation rate and sm

SUBMITTER: Meng D 

PROVIDER: S-EPMC12837109 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature