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温度和土壤水分对银杏叶黄酮类化合物积累的影响

汪贵斌**,郭旭琴,常丽,曹福亮   

  1. (南京林业大学森林资源与环境学院, 南京 210037)
  • 出版日期:2013-11-18 发布日期:2013-11-18

Effects of air temperature and soil moisture  on flavonoids accumulation in Ginkgo biloba leaves.

WANG Gui-bin, GUO Xu-qin, CHANG Li, CAO Fu-liang   

  1. (College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China)
  • Online:2013-11-18 Published:2013-11-18

摘要: 以2年生银杏实生苗为试材,在人工气候室内采用土培盆栽试验方法,研究了温度和土壤水分对银杏叶黄酮类化合物积累的影响.试验设置土壤含水量(W)和温度(T)各3个梯度,W1、W2、W3分别为田间持水量的55%~60%、40%~45%、30%~35%;T1、T2、T3白天和夜间的温度分别为15/5 ℃、25/15 ℃、35/25 ℃.结果表明: T1温度条件下,各土壤水分处理的银杏叶中的槲皮素、山奈酚、异鼠李素和总黄酮含量普遍高于T2和T3,而土壤水分对银杏叶中各种黄酮类化合物积累的影响不显著;银杏叶中黄酮类化合物以山奈酚含量最高,其次为槲皮素和异鼠李素;T3温度下银杏单株总黄酮产量普遍高于T2和T1.在收获前适当采取土壤覆盖和灌水等措施降低种植园的温度,有利于提高银杏叶中黄酮的含量,增加单位面积黄酮的产量.

Abstract: Taking the 2-year-old Ginkgo biloba seedlings as test materials, a pot experiment was conducted in an artificial climate chamber to study the effects of air temperature and soil moisture  on the flavonoids accumulation in leaves. Three levels of air temperature (15/5 ℃, 25/15 ℃, and 35/25 ℃ day/night) and three levels of soil moisture  (55%-60%, 40%-45%, and 30%-35% of field capacity) were installed, yielding nine temperaturesoil moisture combinations. Under the three levels of soil moisture, the quercetin, kaempferol, isorhamnetin, and total flavonoids contents in the leaves were higher at 15/5 ℃ than at 25/15 ℃ and 35/25 ℃. Soil moisture  had minor effects on the flavonoids accumulation. The leaf kaempferol content was the highest, followed by quercetin and isorhamnetin. The total flavonoids yield per plant at 35/25 ℃ was higher than that at 15/5 ℃ and 25/15 ℃. It was suggested that to adopt appropriate soil covering and watering before harvesting to decrease the ambient temperature could benefit the enhancement of leaf flavonoids content and the improvement of per unit area flavonoids production in G. biloba leafharvesting plantation.