Importance of leaf age in grapevines (Vitis spp.) under salt stress

Yaniv Lupo, Kakarla Prashanth, Naftali Lazarovitch, Aaron Fait, Shimon Rachmilevitch

Research output: Contribution to journalArticlepeer-review


The combined effects of salt stress and leaf age on photosynthesis and stomatal conductance are not fully understood. Salt stress develops at different rates in various plant organs and tissues, leading to osmotic and ionic stresses. We studied the development of salt stress (30 mM NaCl) in two grapevine rootstocks by examining the gas exchange, photochemistry, and salt accumulation of leaves at different ages. Our results indicate that leaf age strongly affected photosynthesis but had a minor effect on stomatal conductance in both control and salinity conditions. Surprisingly, salt stress lowered stomatal conductance but had little effect on photosynthesis, opposite to the leaf age effects. Reduction in photosystem II efficiency explained the age-associated decline in photosynthesis, suggesting that the light-dependent phase of photosynthesis is the first process affected by leaf aging. We also found that the sodium exclusion capacity decreased as leaves matured and was age and variety dependent, indicating the importance of leaf age when sampling for salt tolerance studies. Therefore, we suggest that sampling only young leaves is missing critical information in the evaluation of salt-tolerant traits in grapevines.

Original languageEnglish
Article number112325
JournalScientia Horticulturae
StatePublished - 1 Nov 2023


  • Grapevine
  • Leaf age
  • Photosynthesis
  • Salt stress
  • Stomatal conductance

ASJC Scopus subject areas

  • Horticulture


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