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<p>Water Use Efficiency (WUE) regulation plays a key role in the plant response to global climate changes such as warming (New et al. in Philos Trans R Soc A Math Phys Eng Sci 369:6–19, 2011). Nowadays enhanced plant drought tolerance has become a priority trait in current crop improvement efforts. To gain insight into water requirement regulation of the drought-resistant halophyte <i>Sueda altissima</i> we determined WUE<sub>i</sub> under various light conditions. RBL combination (50% red, 50% blue) contributed to twice stomatal conductance/transpiration decreases and a more pronounced response to green/far-red supplementation compared to glycophytic species. The most rapid WUE<sub>i</sub> improvement was observed under far-red light conditions (0% R<sub>660</sub> + 100% FR). The critical role in halophyte growth and development played optimization of red-blue-green light balance in the spectrum. Besides, we also investigated moderate or strong (r &gt; 0.5, r &gt; 0.8) correlations between stomatal conductance (<i>g</i><sub><i>s</i></sub>), transpiration (E), WUE<sub>i</sub> and consequently <i>SaSLAH3</i> expression. Moreover, this report identified 14- and 20-fold higher than control expression increases in responce to R/FR used together. These results suggested that SLAH3 channels have to be involved in phytochrome-controlled pathways of stomatal aperture regulation.</p>

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Novel slow anion channel SLAC/SLAH family protein, SaSLAH3, may be involved in Suaeda altissima (L.) transpiration control under various light treatments

  • 期刊论文

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  • 发表日期：

    2025年5月6日

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  • Helen I. Rostovtseva,
  • Dmitry E. Khramov,
  • Ivan G. Tarakanov,
  • Igor V. Karpichev,
  • Yurii V. Balnokin

摘要

Water Use Efficiency (WUE) regulation plays a key role in the plant response to global climate changes such as warming (New et al. in Philos Trans R Soc A Math Phys Eng Sci 369:6–19, 2011). Nowadays enhanced plant drought tolerance has become a priority trait in current crop improvement efforts. To gain insight into water requirement regulation of the drought-resistant halophyte Sueda altissima we determined WUEi under various light conditions. RBL combination (50% red, 50% blue) contributed to twice stomatal conductance/transpiration decreases and a more pronounced response to green/far-red supplementation compared to glycophytic species. The most rapid WUEi improvement was observed under far-red light conditions (0% R660 + 100% FR). The critical role in halophyte growth and development played optimization of red-blue-green light balance in the spectrum. Besides, we also investigated moderate or strong (r > 0.5, r > 0.8) correlations between stomatal conductance (gs), transpiration (E), WUEi and consequently SaSLAH3 expression. Moreover, this report identified 14- and 20-fold higher than control expression increases in responce to R/FR used together. These results suggested that SLAH3 channels have to be involved in phytochrome-controlled pathways of stomatal aperture regulation.