Scholarlink

<p>This study investigates the physiological and biochemical responses of two <i>Thellungiella salsuginea</i> ecotypes Yukon and Shandong under varying salt treatments. The results revealed that low salt concentrations stimulated plant growth in both ecotypes, whereas high salinity significantly reduced dry biomass compared to the control. This reduction in growth was accompanied by increased Na⁺ accumulation and decreased levels of K⁺ and Ca<sup>2</sup>⁺. Under moderate salt stress (100, 200, and 300&#xa0;mM NaCl), both chlorophyll a and b levels increased, particularly in the Yukon ecotype. However, at higher salinity levels, chlorophyll content declined. Interestingly, at 100&#xa0;mM NaCl, both ecotypes exhibited a sharp reduction in certain growth parameters. Despite morphological differences, both Yukon and Shandong ecotypes demonstrated a capacity to tolerate high salinity, reinforcing the halophytic nature of the species. The Shandong ecotype consistently showed greater resilience than the Yukon ecotype. One key defense mechanism observed was the accumul<sup>2</sup>ation of Na⁺ in older, mature leaves, protecting younger tissues. Additionally, the maintenance of photosynthetic stability under salinity stress was evident. At moderate salinity, Shandong displayed higher stomatal conductance, intercellular CO₂ concentration, and net photosynthesis rates. However, these parameters declined under severe salt stress.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of salinity in growth, photosynthesis, mineral status and oxidative compounds in two ecotypes of the Thellungiella salsuginea

  • 期刊论文

  • 发表日期：

    2026年2月10日

查看全文
  • Rahma Goussi,
  • Rim Ben Youssef,
  • Paolo Pesaresi,
  • Roberto Barbato,
  • Arafet Manaa

摘要

This study investigates the physiological and biochemical responses of two Thellungiella salsuginea ecotypes Yukon and Shandong under varying salt treatments. The results revealed that low salt concentrations stimulated plant growth in both ecotypes, whereas high salinity significantly reduced dry biomass compared to the control. This reduction in growth was accompanied by increased Na⁺ accumulation and decreased levels of K⁺ and Ca2⁺. Under moderate salt stress (100, 200, and 300 mM NaCl), both chlorophyll a and b levels increased, particularly in the Yukon ecotype. However, at higher salinity levels, chlorophyll content declined. Interestingly, at 100 mM NaCl, both ecotypes exhibited a sharp reduction in certain growth parameters. Despite morphological differences, both Yukon and Shandong ecotypes demonstrated a capacity to tolerate high salinity, reinforcing the halophytic nature of the species. The Shandong ecotype consistently showed greater resilience than the Yukon ecotype. One key defense mechanism observed was the accumul2ation of Na⁺ in older, mature leaves, protecting younger tissues. Additionally, the maintenance of photosynthetic stability under salinity stress was evident. At moderate salinity, Shandong displayed higher stomatal conductance, intercellular CO₂ concentration, and net photosynthesis rates. However, these parameters declined under severe salt stress.

Graphical Abstract