检索结果-南通市图书馆

Soil nutrient patchiness affects nutrient use efficiency,though not photosynthesis and growth of parental Glechoma longituba ramets:both patch contrast and direction matter

引用

Journal of Plant Ecology 2010年第2期3卷 131-137页

作者： Hao-qin Xiong State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Graduate University of Chinese Academy of Sciences Beijing 100049China Department of Environmental Science and Engineering Southwest Forestry UniversityKunming 650224China

Aims Most plants are clonal in *** ramets can share water,nutrients and photosynthate,especially when they experience patchy *** contrast(i.e.a difference in resources among patches)and patch direction(***–sink relations)are among the basic attributes of spatial ***,I hypothesize that young established ramets in nutrient-rich patches support old ramets in nutrient-poor patches when ramets are subjected to different patch contrasts and patch *** In a greenhouse experiment,old and young ramets of Glechoma longituba were grown in four combinations consisting of patch contrast and patch *** patch direction refers to a patch combination in which parent ramets grow in nutrient-rich patches while connected daughter ramets grow in nutrient-poor ones and plus patch direction is the opposite *** photosynthesis and fluorescence traits,harvested all ramets,took morphological measures,weighed their dry mass and determined their nutrient uptake and *** Findings For parental ramets of ***,patch contrast and patch direction and their interactions had no significant effects on net photosynthetic rate,maximal fluorescence yield,photochemical quenching(quenching refers to any process which decreases the fluorescence intensity of a given substance),non-photochemical quenching,nutrient uptake,biomass and stolon weight *** direction alone significantly affected root weight *** patch contrast enhanced N use efficiency(NUE)and P use efficiency(PUE);plus patch direction decreased NUE,but increased PUE;the patch contrast by patch direction interaction affected PUE and K use efficiency(KUE).There were significant interactions between patch direction and patch contrast on PUE and *** is concluded that soil nutrient patchiness may influence nutrient use strategies,but not nutrient uptake,photosynthesis and growth of parent ramets of *** connected to daughter ramets,an

关键词： chlorophyll fluorescence Glechoma longituba growth and allocation nutrient use strategy photosynthesis soil nutrient patchiness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of mechanical perturbation and water on the growth of Psammochloa villosa in the windy semiarid Mu Us Sandland

Effects of mechanical perturbation and water on the growth o...

引用

第三届全国植物生态学前沿论坛第三届全国克隆植物生态学研讨会

作者： Yan-Hong Wang~(1,2),Wei-Ming He~(1,*),Fei-Hai Yu~1,Ming Dong~(1,*),Hong Jiang~2,Shu-Quan Yu~2,Xi-Qiao Lin~2 1 State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China 2 Zhejiang Forestry University,Hangzhou 311300,China

The Mu Us Sandland is characterized by water shortage and *** mechanical perturbation(MP) induced by wind is ubiquitous in this area,the interactions between water and MP are *** studies have revealed that soil water and MP have different,even opposite effects on *** we hypothesized that the MP effects on perennial grasses might be suppressed by increased soil water in inland dune *** seedlings of Psammochloa villosa were subjected to two levels of MP(non-MP versus MP 60 s d-1) and two levels of water supply(200 ml d-1 versus 400 ml d-1).MP significantly decreased plant height, leaves,total biomass,and root/shoot ratio;increased soil water significantly enhanced leaves,total biomass,and root/shoot *** interactions between MP and water on the height and root/shoot ratio were *** findings indicate:(1) that MP is a stressful factor for plant growth in terms of biomass,and its effects on *** can be partially suppressed by increased soil water;(2) that changes in height and root/shoot ratio may facilitate plants to cope with arid and windy environments.

关键词： growth and allocation Perennial grass Soil water Suppression Thigmomorphogenesis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：