Partial shading of lateral branches affects growth, and foliage nitrogen- and water-use efficiencies in the conifer Cunninghamia lanceolata growing in a warm monsoon climate

	Partial shading of lateral branches affects growth, and foliage nitrogen- and water-use efficiencies in the conifer Cunninghamia lanceolata growing in a warm monsoon climate
	Dong, Tingfa; Li, Junyu; Zhang, Yuanbin; Korpelainen, Helena; Niinemets, Uelo; Li, Chunyang
刊名	TREE PHYSIOLOGY
	2015
卷号	35 期号:6 页码:632-643
关键词	PHOTOSYNTHETIC CAPACITY LEAF NITROGEN LIGHT ENVIRONMENTS PLANT CANOPIES ALLOCATION ACCLIMATION LEAVES CROWN SUN IRRADIANCE
通讯作者	Li, CY (reprint author), Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Nurturing Stn, Linan 311300, Zhejiang, Peoples R China.
产权排序	1
合作状况	国际
英文摘要	The degree to which branches are autonomous in their acclimation responses to alteration in light environment is still poorly understood. We investigated the effects of shading of the sapling crown of Cunninghamia lanceolata (Lamb.) Hook on the whole-tree and mid-crown branch growth and current-year foliage structure and physiology. Four treatments providing 0, 50, 75 and 90% shading compared with full daylight (denoted as Treatment(0), Treatment(50%), Treatment(75%) and Treatment(90%), and Shaded(0), Shaded(50%), Shaded(75%) and Shaded(90%) for the shaded branches and Sunlit(0), Sunlit(50%), Sunlit(75%) and Sunlit(90%) for the opposite sunlit branches under natural light conditions, respectively), were applied over two consecutive growing seasons. Shading treatments decreased the growth of basal stem diameter, leaf dry mass per unit leaf area, stomatal conductance, transpiration rate, the ratio of water-soluble to structural leaf nitrogen content, photosynthetic nitrogen-use efficiency and instantaneous and long-term (estimated from carbon isotope composition) water-use efficiency in shaded branches. Differences between shaded and sunlit branches increased with increasing severity and duration of shading. A non-autonomous, partly compensatory behavior of non-shaded branches was observed for most traits, thus reflecting the dependence between the traits of sunlit branches and the severity of shading of the opposite crown half. The results collectively indicated that tree growth and branch and leaf acclimation responses of C. lanceolata are not only affected by the local light environment, but also by relative within-crown light conditions. We argue that such a non-autonomous branch response to changes in light conditions can improve whole-tree resource optimization. These results contribute to better understanding of tree growth and utilization of water and nitrogen under heterogeneous light conditions within tree canopies.
学科主题	Forestry
类目[WOS]	Forestry
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/27520]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Dong, Tingfa,Li, Junyu,Zhang, Yuanbin,et al. Partial shading of lateral branches affects growth, and foliage nitrogen- and water-use efficiencies in the conifer Cunninghamia lanceolata growing in a warm monsoon climate[J]. TREE PHYSIOLOGY,2015,35(6):632-643.
APA	Dong, Tingfa,Li, Junyu,Zhang, Yuanbin,Korpelainen, Helena,Niinemets, Uelo,&Li, Chunyang.(2015).Partial shading of lateral branches affects growth, and foliage nitrogen- and water-use efficiencies in the conifer Cunninghamia lanceolata growing in a warm monsoon climate.TREE PHYSIOLOGY,35(6),632-643.
MLA	Dong, Tingfa,et al."Partial shading of lateral branches affects growth, and foliage nitrogen- and water-use efficiencies in the conifer Cunninghamia lanceolata growing in a warm monsoon climate".TREE PHYSIOLOGY 35.6(2015):632-643.