JIN Yifeng,CHEN Yang,SHI Zhenjie,et al.Morphological Structure and Physiological and Biochemical Indexes of Scindapsus aureus Under Drought Stress[J].Northern Horticulture,2018,42(09):100-105.[doi:10.11937/bfyy.20172713]
绿萝在干旱胁迫下形态结构及生理生化指标的相关研究
- Title:
- Morphological Structure and Physiological and Biochemical Indexes of Scindapsus aureus Under Drought Stress
- 文献标志码:
- A
- 摘要:
- 以绿萝为试验材料，采用观察解剖结构、植株外观形态与测定电导率的方法，研究了干旱胁迫对水培绿萝、土培绿萝解剖结构及抗旱能力的影响，以期探究栽培方式（水培、土培）对绿萝抗旱性的影响。结果表明：干旱胁迫下，绿萝会通过叶片卷曲、萎蔫的方式来降低叶表面积，减少植株水分散失。随着干旱天数增加，绿萝的外观形态会发生明显的变化，主要表现在叶面失去光泽、叶面卷曲、叶柄出现下垂。叶片电导率的测定显示，干旱条件下水培绿萝叶片受伤害程度比土培绿萝严重，复水后，水培绿萝对旱后复水的响应是一种延时滞后效应；土培绿萝对旱后复水的响应比水培绿萝更快。干旱胁迫下，绿萝的解剖结构会发生改变，绿萝茎和根的表皮和皮层会出现萎缩，茎的维管柱明显变粗，根的维管柱变扁。通过综合分析，在相同的干旱处理下，土培绿萝的抗旱能力比水培绿萝强，在相同复水条件下，土培绿萝恢复能力比水培绿萝强。
- Abstract:
- With Scindapsus aureus as experimental materials，and the observation of anatomic structure and morphological appearance and the electro-conductibility determination as experimental method，the influence of drought stress on the anatomic structure and drought resistance of hydroponic culture and soil culture Scindapsus aureus were studied，so as to explore the influence of cultivation mode (hydroponic culture and soil culture) on the drought resistance of Scindapsus aureus.The results showed that under drought stress，Scindapsus aureus could reduce leaf surface area and plaint water desorption by the curling and wilting of leaves.With the extension of drought period，Scindapsus aureus showed obvious changes in appearance，mainly presenting tarnish and curling of leaves and pendulous petiole.The measurement of the conductivity of leaves revealed that under drought stress， the degree of damage to the leaves of hydroponic culture Scindapsus aureus was higher than those of soil culture Scindapsus aureus.After rewatering，the response of hydroponic culture Scindapsus aureus to rewatering secondary to drought showed a hysteresis effect，and the response of soil culture Scindapsus aureus to rewatering secondary to drought was faster as compared with hydroponic culture Scindapsus aureus.Under drought stress，the anatomical structure of Scindapsus aureus changed，the epidermis and cortex of the stem and root of Scindapsus aureus shrunk，the vascular cylinder of the stem obviously thickened，and the vascular cylinder of the root flattened.Comprehensive analysis indicated that under the same drought stress，the drought-resistant ability of soil culture Scindapsus aureus was higher than that of hydroponic culture Scindapsus aureus，and under the same rewatering conditions，the restoring ability of soil culture Scindapsus aureus was higher than that of hydroponic culture Scindapsus aureus.
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备注/Memo
第一作者简介：金一锋（1984-），男，硕士，讲师，现主要从事园林植物抗逆生理等研究工作。E-mail：jinyifeng8368215@163.com.基金项目：国家自然科学基金资助项目（31501785）；黑龙江省大学生创新创业资助项目（201610221018，201710232129）；黑龙江省高等教育学会“十三五”高等教育科研课题资助项目(16Q154)。收稿日期：2017-12-25