文献类型：期刊文献

英文题名：Morphological and physiological acclimation of Catalpa bungei plantlets to different light conditions

作者：Wu, J. W.[1] Su, Y.[1] Wang, J. H.[2] He, Q.[1] Qiu, Q.[1] Ma, J. W.[3] Li, J. Y.[1]

第一作者：Wu, J. W.

通信作者：Li, JY[1];Wang, JH[2]

机构：[1]South China Agr Univ, Guangdong Key Lab Innovat Dev & Utilizat Forest P, Coll Forestry & Landscape Architecture, Guangzhou 510642, Guangdong, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[3]Xiaolongshan Forestry Sci & Technol Res Inst, Tianshui 741022, Peoples R China

年份：2018

卷号：56

期号：2

起止页码：537-548

外文期刊名：PHOTOSYNTHETICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000431262000009)】；

基金：This research was supported by the National Science and Technology support Program during the Twelfth Five-year Plan Period (2012BAD21B03, 2012BAD21B0304) and the SCAU Young Foundation 'Clonal eco-physiological responses of Catalpa bungei to different light density and soil-water contents'.

语种：英文

外文关键词：Catalpa bungei; chlorophyll fluorescence; light acclimation; newly developed leaves; photoinhibition

摘要：This study was performed to evaluate the ecophysiological acclimation of Catalpa bungei plantlets to different light conditions. We hypothesized that the acclimation of old and newly developed leaves to both increasing and decreasing irradiance should follow different patterns. The growth, photosynthesis, chlorophyll (Chl) content, and Chl fluorescence response were examined over a range of light treatments. The plants were grown under fixed light intensities of 80% (HH), 50% (MM), 30% (LL) of sun light and transferring irradiance of 80% to 50% (HM), 80% to 30% (HL), 30% to 50% (LM) and 30% to 80% (LH). For old leaves, light-saturation point, photosynthetic capacity, dark respiration rate of LH were lower than that of HH, while HL were higher than LL, indicating that light-response parameters were affected by the original growth light environment. Initial fluorescence increased and variable fluorescence decreased in LH and LM after transfer, and the PSII damage was more serious in LH than that in LM, and could not recover within 30 d. It suggested that the photoinhibition damage and recovery time in old leaves was related to the intensity of light after transfer. For the newly emerged leaves with leaf primordia formed under the same light environment, a significant difference was observed in leaf morphology and pigment contents, suggesting that previous light environment exhibited carry-over effect on the acclimation capacity to a new light environment. Our result showed that thinning and pruning intensity should be considered in plantation management, because great changes in light intensity may cause photoinhibition in shade-adapted leaves.