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当前位置: 首页 > 文章 > 水分胁迫对'翠鸟'玉簪叶片表皮蜡质及生理特性的影响 园艺学报 2019 (7) 1344-1350
Position: Home > Articles > 水分胁迫对'翠鸟'玉簪叶片表皮蜡质及生理特性的影响 Acta Horticulturae Sinica 2019 (7) 1344-1350

水分胁迫对'翠鸟'玉簪叶片表皮蜡质及生理特性的影响

作  者：
曲玉莹;曲波;崔娜;邵美妮;关萍;金恺;许玉凤
单  位：
沈阳农业大学林学院
关键词：
玉簪;水分胁迫;叶片;蜡质;生理特性
摘  要：
为探究土壤水分对阴生植物玉簪叶片表皮蜡质及生长的影响,以蓝叶玉簪'翠鸟'(Hosta 'Halcyon')为试材,采用盆栽方法,设置正常给水、轻度、中度和重度胁迫4种土壤水分处理,研究其叶片表皮蜡质和生理特性的变化,并对它们之间的关系进行了分析.结果表明:在一定范围内,随着干旱程度的增加,表皮蜡质的量随之增大;本研究中,中度胁迫的蜡质最多,其光合速率、蒸腾速率、气孔导度等处于较低水平,表明'翠鸟'玉簪在干旱胁迫下通过减小气孔开度、减少蒸腾速率及叶片水分散失,以提高水分利用效率,从而增强自身的抗旱性;随着胁迫加剧,光合速率、水分利用效率及叶绿素含量明显下降,说明叶绿素合成受到抑制.叶片表皮蜡质的增加,减少了叶片表面通透性,从而降低水分散失,以减少干旱对植株生长的不利影响.此外还发现,蜡质的多少直接影响植物叶片的颜色.中度水分胁迫时,其蜡质最多,同时叶绿素含量较高,所以叶片蓝绿色显著深于重度胁迫处理,观赏价值较高.
作  者：
QU Yuying;QU Bo;CUI Na;SHAO Meini;GUAN Ping;JIN Kai;XU Yufeng;College of Forestry,Shenyang Agricultural University;College of Biolscience and Biotechnology,Shenyang Agricultural University;
单  位：
QU Yuying%QU Bo%CUI Na%SHAO Meini%GUAN Ping%JIN Kai%XU Yufeng%College of Forestry,Shenyang Agricultural University%College of Biolscience and Biotechnology,Shenyang Agricultural University
关键词：
Hosta plantaginea;;water stress;;leaf;;wax;;physiological characteristics
摘  要：
In order to study the effects of soil water on the epicuticular wax and the growth of shade plant leaves,the blue leaf variety of Hosta‘Halcyon'was grown in pots with 4 kinds of soil water treatments,which were normal water supply,light water stress treatment,medium water stress treatment and severe water stress treatment. The changes of epicuticular wax and physiological characteristics of Hosta‘Halcyon'leaves were studied under different water stress,and the relationships between them were analyzed. The results showed that the epicuticular wax increased with the increase of drought,and the photosynthetic rate,transpiration rate and stomatal conductance of the medium stress treatment were at low level within a certain drought range,which indicated that the Hosta‘Halcyon'improved water use efficiency and enhanced drought resistance by reducing stomatal opening,transpiration rate and leaf water loss under water stress. With the further intensity of water stress,photosynthesis rate,water use efficiency and leaf chlorophyll content decreased significantly,indicating that chlorophyll synthesis was inhibited,and the increase of leaf epicuticular wax decreased leaf surface permeability,thus reducing water dispersion loss in order to reduce the adverse effects of drought on plant growth. In addition,the study showed that the wax directly affected the color of the leaves. The medium stress group had the highest wax content and higher chlorophyll content,so the blue-green leaf was significantly deeper than the severe stress group,and the ornamental value was higher.

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