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首页> 外文期刊>HortScience >Treatment with Calcium Chloride Enhances Water Deficit Stress Tolerance in Viola (Viola cornuta)
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Treatment with Calcium Chloride Enhances Water Deficit Stress Tolerance in Viola (Viola cornuta)

机译：用氯化钙治疗增强了中提琴的水缺陷应力耐受性（Viola Cornuta）

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Water deficit stress can reduce the postproduction shelf life and marketability of floriculture crops. To alleviate the damage by water deficiency, plants need to limit transpirational water loss by inducing stomatal closure. Osmotic stress induces stomatal closure like the response to water deficit stress. It could be used as a convenient tool to enhance water deficit stress tolerance by reducing water loss. The objective of this research was to investigate whether osmotic treatment with a high concentration of chemical solutions could trigger a response to osmotic stress so that stomatal closure can be induced, resulting in enhanced water deficit stress tolerance in viola (Viola cornuta 'Sorbet XP Yellow'). Osmotic treatments with CaCl2, Ca(NO3)(2), NaCl, NaNO3, BaCl2, Ba(NO3)(2), and mannitol were applied at the osmotic potentials (psi(S)) of -1.3 and -2.0 MPa. Chemical treatments [except Ca(NO3)(2), NaCl and mannitol] helped to delay wilting and gave a longer shelf life, up to 5.2 days over that of the control, 2.5 days. However, leaf necrosis was observed on the violas treated with NaCl NaNO3, BaCl2, Ba(NO3)(2), and mannitol. CaCl2 was the most effective agent in delaying wilting under water deficit stress in viola without leaf necrosis. Compared with the control, violas treated with CaCl2 at 200 and 300 mM showed an increase in shelf life by 2.6 and 1.2 days, respectively. Stomatal conductance (gs) was reduced within 4 hours after treatment with CaCl2 compared with that of control violas. Leaf relative water content (RWC) of control violas was dramatically reduced 3 days after treatment and fell below 50% on day 4, while CaCl2-treated violas maintained higher leaf RWC (70% to 81%) during the water deficit period. These results indicated that osmotic treatment with the high concentration of CaCl2 caused stomatal closure, resulting in a reduction of water loss and an extension of shelf life under water deficit stress in viola.
机译：水赤字压力可以减少植物栽培保存的后生产和栽培作物。为了减轻水缺乏损害，植物需要通过诱导气孔闭合来限制分娩水分。渗透压力会使气孔闭合如对水缺陷应力的反应。它可以用作方便的工具来通过降低水分损失来提高水缺陷应力耐受性。本研究的目的是研究是否具有高浓度的化学溶液的渗透处理是否可以引发对渗透胁迫的反应，从而诱导气孔闭合，导致中提琴的水缺陷应力耐受性（Viola Cornuta'Sorbet XP Yellow' ）。用CaCl2，Ca（NO 3）（2），NaCl，NaNO 3，Bacl 2，Ba（NO 3）（2）和甘露醇在-1.3和-2.0MPa的渗透电势（PSI）中进行渗透处理。化学处理[除Ca（No3）（2），NaCl和甘露醇]有助于延迟萎缩并给予较长的保质期，高达5.2天，在对照的情况下，2.5天。然而，在用NaCl NaNO 3，Bacl2，Ba（NO 3）（2）和甘露醇处理的中提琴上观察到叶坏死。 CaCl2是最有效的代理商，在没有叶坏死的情况下延迟水缺陷压力下的萎缩。与对照相比，含CaCl2为200和300 mm的中提琴分别将保质期增加2.6和1.2天。与对照中提琴的CaCl2处理后4小时内，气孔电导（GS）降低。治疗后3天的对照管叶的相对含水量（RWC）大幅减少，第4天跌破50％，而CACL2治疗的中提琴在水资源赤字期间保持较高的叶子RWC（70％至81％）。这些结果表明，具有高浓度CaCl2的渗透处理引起了气孔闭合，导致水分损失减少了水缺陷压力的水分损失和延伸。

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