摘要
以两个抗旱性不同的甘蔗品种ROC22和ROC16为试材,采用聚乙二醇模拟干旱胁迫,研究了甘蔗幼苗在干旱胁迫下叶片中类黄酮含量及相关酶活性的变化。结果表明,与对照相比,10%PEG胁迫2 h至14 h,耐旱性强的ROC22品种类黄酮含量降低,耐旱性弱的ROC16品种类黄酮含量先降后升;2个品种幼苗叶片中苯丙氨酸解氨酶活性呈现先降低后升高的变化规律。ROC22叶片多酚氧化酶活性呈先升后降的变化,ROC16叶片多酚氧化酶活性下降;2个品种甘蔗叶过氧化物酶活性持续下降。
The content of flavonoids and related enzyme activities in the young plants were studied in order to analyze the effect of PEG treatment on drought resistance of two sugarcane cultivars ROC22 and ROC16.The results indicated as follows： PEG stress could decrease the content of flavonoids in ROC22 with high drought-resistance,whereas the content of flavonoids in ROC16 with low drought-resistance showed decreasing first and increasing later.During the course of PEG stress,the phenylalanine ammonialyase activity in ROC22 and ROC16 decreased for some time but increased afterwards.The polyphenol oxidase activity showed rising first and dropping later in ROC22 but always decreasing in ROC16.The peroxidase activities in ROC22 and ROC16 decreased continuously.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第6期185-188,203,共5页
Agricultural Research in the Arid Areas
基金
国家科技支撑计划项目(2007BAD30B03)
广西科技攻关项目(0782004-3)
