南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (2): 97-104.doi: 10.12302/j.issn.1000-2006.202210034

• 研究论文 • 上一篇    下一篇

黄连木变色期叶片色素变化规律及呈色机理

许志钊(), 杨秀云*(), 王祎琛, 杜淑辉   

  1. 山西农业大学林学院,山西 太谷 030801
  • 收稿日期:2022-10-26 修回日期:2023-01-30 出版日期:2024-03-30 发布日期:2024-04-08
  • 通讯作者: 杨秀云(xyyang2002@yeah.net),教授。
  • 作者简介:许志钊(846939322@qq.com)。
  • 基金资助:
    山西省基础研究计划项目(202103021224144);山西农业大学生物育种工程项目(YZGC138)

Changes in pigment and coloration mechanism of leaves during the discoloration period of Pistacia chinensis

XU Zhizhao(), YANG Xiuyun*(), WANG Yichen, DU Shuhui   

  1. College of Forestry, Shanxi Agricultural University, Taigu 030801, China
  • Received:2022-10-26 Revised:2023-01-30 Online:2024-03-30 Published:2024-04-08

摘要:

【目的】 研究黄连木(Pistacia chinensis)秋季叶片变色期相关生理指标含量变化,揭示其叶色变化与生理特征间的内在规律。【方法】 以变色期的黄连木为研究对象,对其叶色参数、色素、渗透物质、全氮、全磷含量和关键酶活性变化进行定量测定及分析。【结果】 变色期黄连木叶片中叶绿素和类胡萝卜素含量不断下降,花青素含量增多,叶片变为红色;黄连木变色期叶片中花青素与色相参数a*值、类胡萝卜素与叶绿素质量比、花青素与叶绿素质量比、可溶性糖、游离氨基酸含量、苯丙氨酸解氨酶和花青素合成酶活性极显著正相关(P<0.01),与二氢黄酮醇-4-还原酶活性显著正相关(P<0.05),与全氮含量显著负相关(P<0.05),与全磷含量极显著负相关(P<0.01)。【结论】 黄连木秋季变色期叶片中花青素与叶绿素质量比及花青素含量在变色中期剧增是导致叶片变红的物质基础,可溶性糖含量、苯丙氨酸解氨酶活性是影响呈色的关键因子,同时,变色期矿质元素氮和磷含量显著降低,共同促进花青素合成进而对叶色产生影响。

关键词: 黄连木, 变色期, 花青素, 呈色机理

Abstract:

【Objective】 The changes of physiological substances related to the discoloration period of the leaves of Pistacia chinensis in autumn were studied to reveal the regularity between leaf color and content.【Method】 The experiment was conducted to quantify and analyze the changes in leaf color parameters, pigments, osmotic substances, total nitrogen and phosphorus contents and the key enzyme activities of P. chinensis.【Result】 During the discoloration period, the contents of chlorophyll and carotenoid in leaves continuously decreased, the content of anthocyanins increased, and the leaves turned red. Anthocyanins in the leaves of P. chinensis showed extremely significantly positive correlations with a* values, the ratio of carotenoid to chlorophyll and anthocyanin to chlorophyll, soluble sugar, free amino acid, phenylalanine ammonialyase(PAL) and anthocyanidin synthase(ANS) (P<0.01). Anthocyanins were positively correlated with dihydroflavonol-4-reductase(DFR) (P<0.05). Anthocyanins were negatively correlated with nitrogen(N) (P<0.05). Anthocyanins were extremely significantly negatively correlated with phosphorus(P) (P<0.01). 【Conclusion】 The anthocyanin/chlorophyll ratio and anthocyanin content in the leaves during the autumn discoloration period of P. chinensis are the material basis for leaf reddening in the middle stage of discoloration. Soluble sugar content and PAL enzyme activity are the key factors affecting color. Mineral elements (nitrogen and phosphorus) content in the discoloration period was significantly reduced, promoting anthocyanin synthesis and affecting leaf color.

Key words: Pistacia chinensis, discoloration period, anthocyanins, coloration mechanism

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