角果藜的结实格局及地下散布单位的入土机制

doi:10.11686/cyxb20140242

草业学报 ›› 2014, Vol. 23 ›› Issue (2): 352-357.DOI: 10.11686/cyxb20140242

• 研究简报 • 上一篇

角果藜的结实格局及地下散布单位的入土机制

王喜勇^1,2,高蕊³,周晓青⁴,魏岩^1*

1.新疆农业大学草业与环境科学学院新疆草地资源与生态重点实验室,新疆乌鲁木齐 830052;
2.中国科学院新疆生态与地理研究所, 新疆乌鲁木齐 830011;
3.辽宁丹东市青山保护局,辽宁丹东 118000;
4.陕西宝鸡石油中学生物组,陕西宝鸡 721001

收稿日期:2013-09-13 出版日期:2014-02-25 发布日期:2014-04-20
通讯作者: E-mail:weiyan1966@163.com
作者简介:王喜勇(1978-),男,新疆伊犁人,在读博士。E-mail:wxy701@tom.com
基金资助:
国家自然科学基金(31270436,31360091)资助。

Fruit-set patterns and burial mechanism for subterranean dispersal units of Ceratocarpus arenarius

WANG Xi-yong^1,2, GAO Rui³, ZHOU Xiao-qing⁴, WEI Yan¹

1.Xinjiang Key Laboratory of Grassland Resources and Ecology, College of Grassland & Environmental Science, Xinjiang Agricultural University, Urumqi 830052, China;
2.Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences, Urumqi 830011, China;
3.Dandong Forestry Bureau, Dandong 118000, China;
4.Biological Group, Baoji Petrol Middle School, Baoji 721001, China

Received:2013-09-13 Online:2014-02-25 Published:2014-04-20

摘要/Abstract

摘要： 通过对藜科植物角果藜的物候、地上地下结实格局及地下散布单位入土方式的观察,结果表明,1)角果藜子叶期持续时间长;开花结实早,且持续时间长,约占整个生活周期的4/5。2)地下散布单位仅2枚,位于主茎第1节处,地上散布单位多数,位于三歧聚伞状分枝的叶腋处;形成地下散布单位的花具有专一性。3)地下散布单位以主动性的动态“翻转”模式并借助外力因素的被动方式顺利入土。地上地下结果特性是角果藜适应荒漠生境的特殊对策。

Abstract: Ceratocarpus arenarius is an annual desert plant in the Junggar Basin, Xinjiang. It produces two clearly different types of fruits in aboveground and subterranean on the same plant. The main aims of this study was to investigate the phenology, fruit-set patterns and burial mechanism of the subterranean dispersal units of this species. Life history of C. arenarius is eight month. It has long cotyledon period, there are about 30 days. Blossoming and fruiting soon, and it has a long reproductive period, which accounts for 4/5 of the whole lifecycle. The subterranean dispersal units originate from two female flowers in the binate axils of the first node of the main stem. At the last ten-days of April, the two female flowers are pollinated on the ground; after bracts entirely concrete, the two subterranean fruits develop into underground in the middle ten days of June. The flowers of the subterranean dispersal units of C. arenarius have specificity due to it include only two flowers which are on the first node of the main stem. However, a number of aerial dispersal units on the leaf axil which forms a spherical shape. The subterranean dispersal units bury by both combinative dynamic of the “reversing” mode and passive mode by means of soil and sand brought by wind and rain. This fruiting traits are the adaptative strategies of C. arenarius to the unpredictable desert.

中图分类号:

Q948.1

王喜勇,高蕊,周晓青,魏岩. 角果藜的结实格局及地下散布单位的入土机制[J]. 草业学报, 2014, 23(2): 352-357.

WANG Xi-yong, GAO Rui, ZHOU Xiao-qing, WEI Yan. Fruit-set patterns and burial mechanism for subterranean dispersal units of Ceratocarpus arenarius[J]. Acta Prataculturae Sinica, 2014, 23(2): 352-357.

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角果藜的结实格局及地下散布单位的入土机制

Fruit-set patterns and burial mechanism for subterranean dispersal units of Ceratocarpus arenarius

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