摘要
Responses of morphology and growth of Ligustrum lucidums were investigated to drought stress using potted-plant in Yangling,China.Two water treatments were used by artificially controlling soil moisture.One was normal water supply(70% of the maximum soil moisture),and the other was severe water deficit(30% of the maximum soil moisture).The results showed that severe water deficit significantly affected the growth rate,leaf characteristic,branching pattern,biomass and their distribution of the tree species.On severe water deficit condition,the survival ratio of the seedlings did not decrease notably.The growth of leaves area was obviously hampered on drought stress.The biomass was reduced in the drought-stressed seedlings,compared with the control.The leaf dry weight decreased,whereas the stem biomass dry weight increased.The growth of branch of the seedlings was changed in response to the drought stress.Both total branch number and total branch length were decreased,and their bifurcation ratio was also decreased.The outer branches number,which is very important for photosynthesis,significantly descended with the reduced length.However,the root/shoot ratio remained unchanged.
Responses of morphology and growth of Ligustrum lucidums were investigated to drought stress using potted-plant in Yangling, China. Two water treatments were used by artificially controlling soil moisture. One was normal water supply （70% of the maximum soil moisture）, and the other was severe water deficit （30% of the maximum soil moisture）. The results showed that severe water deficit significantly affected the growth rate, leaf characteristic, branching pattern, biomass and their distribution of the tree species. On severe water deficit condition, the survival ratio of the seedlings did not decrease notably. The growth of leaves area was obviously hampered on drought stress. The biomass was reduced in the drought-stressed seedlings, compared with the control. The leaf dry weight decreased, whereas the stem biomass dry weight increased. The growth of branch of the seedlings was changed in response to the drought stress. Both total branch number and total branch length were decreased, and their bifurcation ratio was also decreased. The outer branches number, which is very important for photosynthesis, significantly descended with the reduced length. However, the root/shoot ratio remained unchanged.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2008年第8期145-148,共4页
Scientia Silvae Sinicae
基金
中国科学院知识创新项目(KZCX-06)
国家自然科学基金"西部环境与生态学科重大研究计划"(90302005)
河南科技大学人才科学研究基金(04054)资助
关键词
女贞
形态
生长
干旱
胁迫
Ligustrum lucidums
morphology
growth
drought stress
