TAN Yong,LIANG Zong-suo,AN Yu-yan.Primary Study on Changing Adjustment Substance of Leaves of Three Evergreen Tree Species in Winter and Water Stress in Loess Plateau[J].Research of Soil and Water Conservation,2007,14(03):70-73.
冬季干旱胁迫下黄土高原三种常绿树种叶片渗透调节物质变化研究
- Title:
- Primary Study on Changing Adjustment Substance of Leaves of Three Evergreen Tree Species in Winter and Water Stress in Loess Plateau
- Keywords:
- water stress; evergreen tree species; Pro; soluble sugar; k+; Loess Plateau
- 分类号:
- S718.43
- 摘要:
- 用盆栽试验研究冬季在水分胁迫条件下三种常绿树木渗透调节物质的变化特征.研究结果表明：在冬季适宜土壤水分(田间持水量的70%)和严重干旱(田间持水量的30%)2种土壤水分条件下，侧柏、女贞和小蜡渗透调节物质变化呈现出一定的变化规律.在相同生长期内渗透调节物质含量水分胁迫(30%)高于正常供水(70%).侧柏与女贞和小蜡相比，叶片水势低，可溶性糖和k+含量较高，脯氨酸含量差异不显著.渗透调节物质含量在12月和1月最高.运用水势、可溶性糖含量和k+含量评价三个树种对干旱和低温适应强弱的顺序依次为侧柏，女贞和小蜡.黄土高原造林过程中可根据生态环境条件和实际用途进行树种选择.
- Abstract:
- Studying changing index of drought resistance of three evergreen tree spices in winter and water stress by pot experiment.Platycladus orientalis,Ligustrum lucidum and Ligustrum sinense had some the rule of change.Two water treatments were set by artificially controlling soil moisture.One was normal water supply(70% θf),and the other was severe water deficit(30% θf).The results showed that Osmoregulation of water stress are high than normal water at the same time.Needle-leaves tree compared with broad-leaves tree spices,leaves potential water is low,soluble sugar and k+ content is high,Pro content is not obvious.Osmoregulation content are most higher in December and January.Platycladus orientalis needle-leaves tree species has stronger ability to adapt to stress than Ligustrum lucidum and Ligustrum sinense broad-leaves tree spices by leaves water potentical,soluble sugar and k+ content,so on the basis ecological environment and practical functions,selecting feasible tree spices during planting trees in Loess Plateau.
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备注/Memo
收稿日期:2006-5-29
基金项目:国家自然科学基金"西部环境和生态科学重大研究计划"项目(90302005);中国科学院"西部之光"人才培养基金(2001)项目共同资助
作者简介:谭勇(1976- )，男，在读博士研究生，研究方向植物生理生化和作物抗旱性评价.