茉莉酸甲酯对植物生长和叶片特性的影响,Journal of Plant Nutrition and Soil Science

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茉莉酸甲酯对植物生长和叶片特性的影响
Journal of Plant Nutrition and Soil Science ( IF 2.6 ) Pub Date : 2018-04-14 , DOI: 10.1002/jpln.201700373
Cui Li ₁ , Peng Wang _{2,

3} , Neal W. Menzies ₁ , Enzo Lombi ₄ , Peter M. Kopittke ₁

Affiliation

茉莉酸甲酯 (MeJA) 的外源应用可以诱导作为植物防御反应组成部分的解剖学和化学变化。特别是，众所周知，MeJA 可以增加叶子毛状体密度以防止食草昆虫，但令人惊讶的是，人们对 MeJA 对其他叶子特性和植物生长的影响知之甚少。使用 0.0、0.1、0.5、1.0 和 2.5 mM MeJA 处理的向日葵（Helianthus annuus）、番茄（Solanum lycopersicum）和大豆（Glycine max），我们检查了叶毛密度、气孔密度、角质层厚度、角质层组成的变化、植物高度和生物量生产。对于所有三种植物物种，MeJA（尤其是在较高浓度下）导致植物高度（高达 39%）和生物量（高达 79%）显着降低。MeJA 导致所有三个物种的叶毛密度显着增加（高 1.3-3.5 倍），这些影响的程度随着 MeJA 浓度的增加而增加。然而，我们还观察到 MeJA 导致表皮成分和厚度以及气孔密度发生显着变化，尽管这些变化的幅度相对于毛状体密度的变化较小。具体而言，高浓度的 MeJA 增加了叶表皮中酚类化合物和角质的相对含量，同时降低了多糖的相对含量。气孔密度的变化因植物种类和 MeJA 浓度而异。此外，MeJA 增加了番茄的角质层厚度，但降低了向日葵和大豆的角质层厚度。因此，

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Effects of methyl jasmonate on plant growth and leaf properties

Exogenous application of methyl jasmonate (MeJA) can induce anatomical and chemical changes that are components of defence responses in plants. Particularly, MeJA is well-known to increase leaf trichome density to protect against insect herbivory, but surprisingly little is known about the effects of MeJA on other leaf properties and plant growth. Using sunflower (Helianthus annuus), tomato (Solanum lycopersicum), and soybean (Glycine max) treated with 0.0, 0.1, 0.5, 1.0, and 2.5 mM MeJA, we examined changes in leaf trichome density, stomatal density, cuticle thickness, cuticle composition, plant height, and biomass production. For all three plant species, MeJA (especially at the higher concentrations) caused significant decreases in plant height (up to 39%) and biomass (up to 79%). MeJA caused substantial increases in leaf trichome density (being 1.3-3.5-times higher) in all three species, with the magnitude of these effects increasing with MeJA concentration. However, we also observed that MeJA resulted in significant changes in cuticle composition and thickness, and stomatal density, although the magnitude of these changes was smaller relative to changes in trichome density. Specifically, high concentrations of MeJA increased the relative content of phenolic compounds and cutin in leaf cuticle while decreasing the relative content of polysaccharide. The changes in stomatal density varied with plant species and MeJA concentration. Also, MeJA increased cuticle thickness in tomato but decreased that in sunflower and soybean. Thus, studies investigating MeJA should also consider the importance of changes in other leaf properties and plant growth.

更新日期：2018-04-14

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