Biomass allocation, compensatory growth and internal C/N balance of Lolium perenne in response to defoliation and light treatments

doi:10.3161/15052249PJE2016.64.4.004

	Biomass allocation, compensatory growth and internal C/N balance of Lolium perenne in response to defoliation and light treatments
	Wang, LH; Wang, JN; Gan, YM (reprint author), Sichuan Agr Univ, Dept Grassland Sci, Yaan 625014, Sichuan, Peoples R China.; Wu, Y (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China.; Wu, Y; Gan, YM; Liu, W
刊名	POLISH JOURNAL OF ECOLOGY
	2016
卷号	64 期号:4 页码:485-499
关键词	Biomass Allocation Defoliation Light Regimes Allometry Carbon Concentration Nitrogen Concentration
DOI	10.3161/15052249PJE2016.64.4.004
产权排序	3
文献子类	Article
英文摘要	Light environments can have a considerable influence on how plants respond to defoliation through influencing the biomass allocation patterns and internal C/N ratio. Seedlings of Lolium perenne, a common perennial grass species, were grown for eight weeks under three different light environments (natural light, red light and shading) and two different defoliation treatments (no defoliation versus 50% aboveground biomass removal). This study was conducted to examine (1) the effects of light regimes and defoliation on biomass accumulation, biomass allocation and internal C/N ratio status in plants; (2) how the light regimes influence the pattern of compensatory growth after defoliation; and (3) the relationship between compensatory growth and the internal C/N ratio status. We found that red light altered the shoot-to root allometry, enhanced the leaf C concentrations and induced N deficiency. By contrast, the leaf N concentrations of L. perenne were greater during shading treatment, which simultaneously enhanced shoot growth and stopped root growth. Under defoliation, red light increased shoot growth, not at the expense of root growth, which was not the same as in natural light and shading treatment. Moreover, regardless of the unclipped (no defoliation) and defoliation conditions, the L. perenne biomass partitioning between roots and shoots was significantly correlated with the leaf N concentrations and C/N ratio, indicating that allometric biomass allocation can be largely modulated by signals related to the C and N status of the plants. These results demonstrated that the leaf C and N status would be an appropriate indicator of compensatory growth after defoliation.
学科主题	Environmental Sciences & Ecology
资助项目	中国科学院山地生态恢复与生物资源利用重点实验室
语种	英语
资助机构	Strategic Leading Sci-tech Program of the Chinese Academy of Sciences (CAS) [XDA05050307] ; Strategic Leading Sci-tech Program of the Chinese Academy of Sciences (CAS) [XDA05050307] ; Strategic Leading Sci-tech Program of the Chinese Academy of Sciences (CAS) [XDA05050307] ; Strategic Leading Sci-tech Program of the Chinese Academy of Sciences (CAS) [XDA05050307]
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/28151]
专题	成都生物研究所_生态研究
通讯作者	Gan, YM (reprint author), Sichuan Agr Univ, Dept Grassland Sci, Yaan 625014, Sichuan, Peoples R China.; Wu, Y (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China.
推荐引用方式 GB/T 7714	Wang, LH,Wang, JN,Gan, YM ,et al. Biomass allocation, compensatory growth and internal C/N balance of Lolium perenne in response to defoliation and light treatments[J]. POLISH JOURNAL OF ECOLOGY,2016,64(4):485-499.
APA	Wang, LH.,Wang, JN.,Gan, YM .,Wu, Y .,Wu, Y.,...&Liu, W.(2016).Biomass allocation, compensatory growth and internal C/N balance of Lolium perenne in response to defoliation and light treatments.POLISH JOURNAL OF ECOLOGY,64(4),485-499.
MLA	Wang, LH,et al."Biomass allocation, compensatory growth and internal C/N balance of Lolium perenne in response to defoliation and light treatments".POLISH JOURNAL OF ECOLOGY 64.4(2016):485-499.