Leaf ¹³C and ¹⁵N composition shedding light on easing drought stress through partial K substitution by Na in eucalyptus species.

ABSTRACT: This work aimed to investigate the partial K-replacement by Na supply to alleviate drought-induced stress in Eucalyptus species. Plant growth, leaf gas exchange parameters, water relations, oxidative stress (H₂O₂ and MDA content), chlorophyll concentration, carbon (C) and nitrogen (N) isotopic leaf composition (δ¹³C and δ¹⁵N) were analyzed. Drought tolerant E. urophylla and E. camaldulensis showed positive responses to the partial K substitution by Na, with similar dry mass yields, stomatal density and total stomatal pore area relative to the well K-supplied plants under both water conditions, suggesting that 50% of the K requirements is pressing for physiological functions that is poorly substituted by Na. Furthermore, E. urophylla and E. camald

SUBMITTER: Mateus NS 

PROVIDER: S-EPMC8505639 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature