盐腺在四种盐生植物补钙磨机的耐盐性中起关键作用。物种,Plant Biology

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盐腺在四种盐生植物补钙磨机的耐盐性中起关键作用。物种
Plant Biology ( IF 4.2 ) Pub Date : 2021-05-10 , DOI: 10.1111/plb.13284
P Mi ₁ , F Yuan ₁ , J Guo ₁ , G Han ₁ , B Wang ₁

Affiliation

柠檬厂。植物是典型的盐生植物，因为它们通过盐腺将多余的盐分分泌到叶片表面来承受盐胁迫。然而，关于这些植物的盐度阈值和盐腺在耐盐中的功能知之甚少。
在这里，我们调查了柠檬属植物 L. aureum (Linn.) Hill、L. gmelinii (Willd.) Kuntze、L. otolepis ( Schrenk) Kuntze 和L. sinuatum (L.) Mill的耐盐盐度阈值。不同浓度的 NaCl。
L. otolepis、L. aureum、L. sinuatum和L. gmelinii的盐度阈值分别为300、350、400和 420 mm NaCl。相关性分析表明，总干重、叶绿素含量和细胞间CO _{2浓度与四种}柠檬草的总鲜重呈高度正相关，可作为植物耐盐性的指标。此外，随着叶面盐腺密度的增加，每个盐腺的盐分泌速率也增加，从而使植物分泌更多的Na ^{+ 。}冗余判别分析表明，盐腺密度、Na ⁺每个盐腺的含量和Na ⁺分泌率与盐浓度呈正相关。
这些观察结果支持盐腺在柠檬属植物适应高盐度条件中起重要作用的观点。

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Salt glands play a pivotal role in the salt resistance of four recretohalophyte Limonium Mill. species

Limonium Mill. plants are typical recretohalophytes, as they withstand salt stress by secreting excess salt onto the leaf surface through salt glands. However, little is known on the salinity thresholds of these plants and the function of salt glands in salt tolerance.
Here, we investigated the salinity thresholds of salt tolerance of the Limonium species L. aureum (Linn.) Hill, L. gmelinii (Willd.) Kuntze, L. otolepis (Schrenk) Kuntze and L. sinuatum (L.) Mill grown with various concentrations of NaCl.
The salinity thresholds of L. otolepis, L. aureum, L. sinuatum and L. gmelinii were 300, 350, 400 and 420 mm NaCl, respectively. Correlation analysis indicated that total dry weight, chlorophyll content and intercellular CO₂ concentration were highly positively correlated with the total fresh weights of all four Limonium species and could therefore be used as indicators of plant salt tolerance. Furthermore, as the salt gland density on the leaf surface increased, the rate of salt secretion per salt gland also increased, allowing more Na⁺ to be secreted from the plant. Redundancy discriminant analysis indicated that salt gland density, Na⁺ content and Na⁺ secretion rate per salt gland were positively correlated with salt concentration.
These observations support the notion that salt glands play important roles in the adaptation of Limonium species to high salinity conditions.

更新日期：2021-05-10

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