文献类型：期刊文献

英文题名：Juvenile Leaf Color Changes and Physiological Characteristics of Acer tutcheri (Aceraceae) during the Spring Season

作者：Xie, Yating[1,2] Pei, Nancai[1] Hao, Zezhou[1] Shi, Zhaowan[1] Chen, Lei[3] Mai, Baoying[4] Liu, Qunhui[5] Luo, Jiajie[5] Luo, Mingdao[4] Sun, Bing[1]

第一作者：Xie, Yating

通信作者：Sun, B[1];Chen, L[2]

机构：[1]Res Inst Trop Forestry, Chinese Acad Forestry, Guangzhou 510520, Peoples R China;[2]Nanjing Forestry Univ, Coll Landscape Architecture, Nanjing 210037, Peoples R China;[3]Int Ctr Bamboo & Rattan, Beijing 100102, Peoples R China;[4]Res Inst Forestry Gaoming Dist, Foshan 528000, Peoples R China;[5]Urban Forestry Stn Gaoming Dist, Foshan 528000, Peoples R China

年份：2023

卷号：14

期号：2

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000939114600001)】；

基金：This research was funded by the Science and Technology Program of the Forestry Administration of Guangdong Province, China (grant number 2021KJCX017); the National Natural Science Foundation of China (grant number 31600449); and the Program of Guangzhou Municipal Science and Technology Bureau, China (grant number 202102021257).

语种：英文

外文关键词：Acer tutcheri; juvenile leaves; anthocyanin; physiological characteristics; color fading

摘要：Leaf color is a key trait that determines the ornamental quality of landscape tree species such as Acer tutcheri, and anthocyanin is the main pigment for red leaf coloration. Red leaf fading significantly reduces the ornamental value of A. tutcheri leaves in the spring; however, the physiological mechanism that causes red leaf discoloration in this species is still unclear. Only the anabolic or degradative metabolism of anthocyanin has been studied in terms of leaf color changes. In this study, leaves from four color-change stages of A. tutcheri during the spring were selected by the average sampling method, which involves measuring and analyzing the pigment content and physiological factors related to anthocyanin metabolism, aiming to clarify the key physiological factors of spring leaf coloration. Our results show that the reduced anthocyanin/chlorophyll ratio was the direct cause of red leaf fading in spring. The carbohydrates synthesized during the growth of juvenile leaves were mainly used for their growth and development, whereas fewer carbon sources were used for the synthesis of anthocyanin. Phenylalanine ammonia-lyase and chalcone isomerase activities increased in the early stages of juvenile leaf development and decreased in the middle and late stages, whereas peroxidase activity continued to increase. The decrease in anthocyanin synthesis-related enzyme activity reduced the accumulation of anthocyanin, whereas the increase in anthocyanin degradation-related enzyme activity accelerated the depletion of anthocyanin. Increasing vacuole pH was a major factor in the degradation of anthocyanin. The physiological characteristics of A. tutcheri leaves during the spring season suggest that anthocyanin is a key factor affecting the presentation of color in juvenile leaves, and red leaf fading in the spring of A. tutcheri is the result of the joint effect of the decrease in anthocyanin anabolic metabolism and the increase in anthocyanin degradative metabolism.