摘要
研究了水分胁迫处理对药用植物中华芦荟的甙、多糖、总糖、可溶性糖、蛋白质及脯氨酸含量以及生物量的影响.结果表明:甙含量与土壤含水量呈极显著的负相关,水分胁迫增加了单位干质量叶片中的甙含量;叶片中的主要药用成分之一多糖含量明显下降,总糖的含量也不断减少;而可溶性糖和脯氨酸含量明显上升,与土壤含水量呈显著负相关;受到水分胁迫的中华芦荟与对照比较,整株、地上部分和根的鲜重均下降,并且胁迫强度愈大降低愈多.说明随着水分胁迫不断增加,中华芦荟次生代谢活跃,光合作用减弱,同化能力下降,从而增加了甙的含量,积累的碳水化合物总量不断减少,而在一定程度的水分胁迫处理中,可溶性糖和脯氨酸含量的增加与其增强植物抗性的生理功能密切相关.随着干旱失水,芦荟多糖含量及生物量的减少降低了芦荟的经济价值.
This paper reports the changes of important Medicinal components such as aloen, polysaccha- ride, whole sugar, soluble sugar, protein, proline, and bio-mass of Aloe vera L. var. chinesis under the condition of drought： the component of aloin in dry leave matter is on the increase but the total production of aloin, polysaccharide, whole sugar, protein and bio-mass are on the decease, as can be said that its financial productions are on the decrease, but the components of soluble sugar, proline are on the increase, which enhances the anti-water stress ability of Aloe vera L. var. chinesis. These show that inhabitation of primary metabolism leads to lessening of aloe polysaccharide and bio-mass; and enhancement of secondary metabolism causes more accumulation of aloin. Due to the rate of bio-mass decrease is faster than that of aloin accumulation, productivity an the value of aloin is on the decrease.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第4期106-109,共4页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(30500303)
西南大学博士科研基金资助项目(240-432108)
关键词
中华芦荟
水分胁迫
药用成分
Aloe vera L. var. chinesis
water stress, medical components
