摘要
研究了在设定盐碱环境情况下水淹高度和时间梯度处理对海滨木槿生理指标的变化,结果表明,高盐碱环境是伤害海滨木槿的主要影响因素,海滨木槿缺乏相应的器官或生理机制适应高盐碱和水涝的共同胁迫,植株处于生理干旱的状态,叶、茎、皮含水量减少,净光合速率、气孔导度、蒸腾速率、水分利用效率、光化学效率降低,生长势减弱;随着胁迫时间的延长,各生理指标中,叶绿素a、叶绿素b、类胡萝卜素的含量表现为不断减少,而相对电导率、伤害率、脯氨酸含量、丙二醛含量则表现为不断增加。
Study on effect of treatment of different water immersion height and duration on physiological characteristics change of Hibiscus hamabo under saline and alkali stress showed that the main factor damaged to H. hamabo was high salt stress, and it was not adapted to high saline and alkali and water stress for lacking relevant organs and physiological mechanism, and the plant were at physiological drought condition. Water content of leaf, stem and bark, net photosynthetic rate, stomatal conductance, transpiration rate, water use efficency and photochemical efficiency decreased. With the duration of stress, the contents of chlorophyll a, chlorophyll b and carotenoid declined, while relative conductivity, damage rate, contents of proline and malondialdehyde increased.
出处
《浙江林业科技》
北大核心
2008年第3期43-47,共5页
Journal of Zhejiang Forestry Science and Technology
基金
浙江省科技厅重大专项项目"浙江海涂绿化观赏树种选育及产业化开发"(2005F11001)
"浙江省沿海防护林特色树种选育及技术集成研究"(2005C12004)
关键词
海滨木槿
盐碱胁迫
水胁迫
生理特性
光合作用
Hibiscus hamabo
saline stress
water stress
physiological characteristic, photosynthesis
