3种卫矛属植物叶片秋冬季转色期生理生化特征研究
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引用本文:宋 鹏,丁彦芬,卓启苗,李 涵,王亚楠,徐子涵,蔡 慧.3种卫矛属植物叶片秋冬季转色期生理生化特征研究[J].西北植物学报,2019,39(4):669~676
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宋 鹏,丁彦芬*,卓启苗,李 涵,王亚楠,徐子涵,蔡 慧 (南京林业大学 风景园林学院南京 210000) 
基金项目:国家林业局“948”项目(2013 4 30);
中文摘要:以疏花卫矛(Euonymus laxiflorus)、丝棉木(E. maackii)和卫矛(E.alatus)3种卫矛属植物为试验材料,测定叶片转色期叶色参数和相关生理生化指标,探讨各项指标的变化规律和内在联系,为优良色叶植物的筛选提供依据。结果表明:(1)转色期,疏花卫矛的明亮度参数L*和色素参数b*(黄/蓝)呈上升趋势,色素参数a*(红/绿)变化不大;丝棉木的L*b*呈先上升后下降的单峰曲线,a*呈上升趋势;卫矛的L*b*变化不大,a*呈上升趋势。(2)3种植物的叶绿素含量在转色期呈明显下降趋势;疏花卫矛的花色素苷相对含量、花色素苷/叶绿素的值较为平稳,类胡萝卜素/叶绿素的值呈上升趋势;丝棉木和卫矛的花色素苷相对含量、花色素苷/叶绿素的值均呈上升趋势,类胡萝卜素/叶绿素的值保持平稳。(3)3种植物苯丙氨酸解氨酶(PAL)活性呈下降趋势,查尔酮异构酶(CHI)活性呈先上升后下降的单峰曲线;卫矛的过氧化物酶(POD)和多酚氧化酶(PPO)活性保持平稳,疏花卫矛和丝棉木的POD活性呈上升趋势,疏花卫矛的PPO活性保持平稳,丝棉木的PPO活性呈下降趋势。(4)疏花卫矛和卫矛的可溶性糖和淀粉的质量分数呈先上升后下降的单峰曲线,丝棉木的可溶性糖和淀粉的质量分数呈上升趋势。(5)相关性分析显示,疏花卫矛呈现黄色主要是因为叶绿素的分解,丝棉木和卫矛呈现红色是因为花色素苷的合成,可溶性糖、淀粉、CHI对花色素苷的合成有一定作用,POD对叶片呈现红色有促进作用,PAL和PPO活性对花色素苷的合成无显著影响。
中文关键词:卫矛属  转色期  叶片  叶色参数  生理生化指标
 
Physiological and Biochemical Characteristics of Leaves during the Color Change Period of Three Species of Euonymus in Autumn and Winter
Abstract:With the perennial cutting seedling of Euonymus laxiflorus, E. maackii and E. alatus as experimental materials, we determined the leaf color parameters and related physiological and biochemical indexes of the leaves during the color change period. The changing rules and internal relations of various indicators were discussed, with a prospect to provide a scientific basis for selecting excellent color leaf plants. The results showed that: (1) the values of L*(Gloss brightness) and b*(Yellow/Blue) of E. laxiflorus showed an upward trend, and the value of a* (Red/Green) did not change much. The values of L* and b* of E. maackii increased first and then decreased and the value of a* is on the rise. The values of L* and b* of E. alatus did not changed much and the value of a* is on the rise. (2) The chlorophyll content of the 3 species showed a significant downward trend during the color change period. The relative content of anthocyanins and the value of anthocyanin / chlorophyll of E. laxiflorus were relatively stable while its value of carotenoid/chlorophyll increased. The relative content of anthocyanin and the value of anthocyanin/chlorophyll of E. maackii and E. alatus increased, and their value of carotenoid/chlorophyll remained stable. (3) The phenylalanine ammonia lyase (PAL) activity of the three species showed a downward trend, and the activity of chalcone isomerase (CHI) increased first and then decreased. The activities of peroxidase (POD) and polyphenol oxidase (PPO) of E. alatus remained stable. The POD of E. laxiflorus and E. maackii increased. The PPO of E. laxiflorus remained stable and the PPO of E. maackii showed a downward trend. (4) The mass fraction of soluble sugar and starch of E. laxiflorus and E. alatus increased first and then decreased. The mass fraction of soluble sugar and starch of E. maackii increased. (5) According to the correlation analysis, the yellow color of E. laxiflorus was mainly due to the decomposition of chlorophyll. The red color of E. maackii and E. alatus were mainly due to the synthesis of anthocyanins. Soluble sugar, starch, CHI had a certain effect on the synthesis of anthocyanins. POD promoted the appearance of red leaves. PAL and PPO had no significant relationship with the synthesis of anthocyanins.
keywords:Euonymus  color change period  leaf  leaf color parameters  physiological and biochemical indicators
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