长年干旱环境对新疆豆科植物根瘤形态结构的影响

应用生态学报 ›› 1993, Vol. 4 ›› Issue (3): 299-302.

长年干旱环境对新疆豆科植物根瘤形态结构的影响

蔺继尚¹, 王丽霞¹, 关桂兰²

1. 中国科学院沈阳应用生态研究所, 沈阳 110015;
2. 中国科学院新疆生物土壤沙漠研究所, 乌鲁木齐 830011

收稿日期:1992-11-14 修回日期:1993-05-07 出版日期:1993-07-25 发布日期:1993-07-25
基金资助:
国家自然科学基金资助项目

Influence of long-term aridity on morphological characteristics of legume nodules in Xinjiang

Lin Jishang¹, Wang Lixia¹, Guan Guilan²

1. Institute of Applied Ecology, Academia Simica, Shenyang 110015;
2. Xinjiang Institute of Biology, Ped01ogy and Psammology, Academia Sinica, Urumqi 830011

Received:1992-11-14 Revised:1993-05-07 Online:1993-07-25 Published:1993-07-25

摘要/Abstract

摘要： 对生长在新疆干旱地区的豆科植物苦豆子(Sopara alopecuroides)、新疆黄芪(Astragalus sp.)和新疆野豌豆(Vicia costata)根瘤的形态和结构进行了光学显微镜和电子显微镜观察.根瘤的形态结构受到当地长期干旱环境的影响,根瘤皮层明显地比非干旱区豆科植物根瘤皮层厚.相对厚的皮层为根瘤中心区内的类菌体提供了一个适应范围较大的气体扩散屏障.而在根瘤的中心区,3种豆科植物超微结构差异较大,未发现一种普遍的能与周围干旱生态环境直接相关的根瘤中心区结构特征,表明根瘤皮层结构的改变足以抵御外界干旱的条件.

关键词: 豆科植物, 根瘤皮层, 新疆干旱区

Abstract: Nodules of three legume species, Sopora alopecuroides, Astragaous sp. and Vicia costata in Xinjiang are studied on their morphological characteristics with light microscopy and EM. It is found that the shape and structure of nodules are influenced by local environment. Under long-term aridity and high soil temperature, they have a thicker cortex, which as a flexible barrier supports a moderate microenvironment for bacteroids within the nodule. No relationship between ultrastructure of nodule's central zone and dry environment has been found in this study, although there is an obvious structural difference among tested legume species.

Key words: Leguminous plant, Nodule cortex, Xinjiang arid area

蔺继尚, 王丽霞, 关桂兰. 长年干旱环境对新疆豆科植物根瘤形态结构的影响[J]. 应用生态学报, 1993, 4(3): 299-302.

Lin Jishang, Wang Lixia, Guan Guilan. Influence of long-term aridity on morphological characteristics of legume nodules in Xinjiang[J]. Chinese Journal of Applied Ecology, 1993, 4(3): 299-302.

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