摘要
沙棘被誉为先锋植物,是因为它是放线菌结瘤植物。放线菌结瘤植物最重要的特点是以共生体结构与功能的完美组合,固定大气中N2,使生命赖以生存的光合C循环和代谢N循环有机的连接起来,从而实现了生命的生长与发育。并解决了贫瘠土质的缺肥,地球氮循环的补充。其次,放线菌植物和Frankia菌,它们遗传上的双重多样性结合,赋予了共生生物生态上的广泛适应性和抗逆性。为荒漠化条件下的生态重建、绿化河山、植被生存和演替,创造了生存条件。
Seabuckthorn is regarded as a pioneer plant for its actinorhizal property. The most important characteristics of the actiorhizal plant relies on the symbiont with Frankia in root nodules to fix the N2 from atmosphere. The symbiont keeps a fine combination of structure and functions, which makes it possible of the photosynthesis C circulation and the metabolism N circulation of plants. This circulation not only keeps the growth and the development of the life also improves the soil. Because of hereditary diversity of actiborhizal plant and Frankia bacteriod, Seabuckthorn, keeping the extensive adaptability and the stress resistance to ecosystem, shows its significance in ecological restoration, aforestation and vegetation succession in fragile environment.
关键词
放线菌植物
沙棘
共生体
弗兰克氏菌
根瘤
多样性
抗逆性
actnorhizal plant
Hippophae rhmnoides L.
symbiont
Frankia
root nodules
diversity
stress resistance
