学术
摘 要:
以调查统计的方法研究了高寒草甸匍匐茎植物短穗免耳草Lagotis brachystachya无性系的生长特征、形态特征以及能量分配规律，研究结果表明：匍匐茎只有1条的短穗免耳草最多，占60．47％，匍匐茎有4条的短穗兔耳草只占6．98％。在牧草生长盛期，短穗兔耳苹无性系的基株高度4．03cm，根长为9．11cm，叶数为7．98；分株高度0．85cm，根长2．73cm，叶数为3．08；匍匐茎的茎生叶数为12．54，长度为15．14cm，匍匐茎比节间重为2．18mg／cm，粗度为0．97mm，不同构件的干质量呈现出基株〉匍匐茎〉分株〉茎生叶的规律。随着匍匐茎数目的增多，短穗兔耳苹无性系的基株根长逐渐增加，用于克隆繁殖的能量投资也有增加的趋势，其他参数都没有明显的变化规律。[著者文摘]
文章出处:
《草业科学》-2006年23卷12期 -60-64页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-0629（2006）12-0060-05
Characteristics of clonal growth of Lagotis brachystachya
ZHOU Hua-kun, ZHAO Liang, ZHAO Xin-quan, HAN Fa, GU Song, ZHOU Li （Northwest Plateau Institute of Biology, Chinese Academy of Science, Xining 810001, China）
Abstract:
The characteristics of clonal plant, Lagotis brachystachya were studied in alpine meadow by investigation and statistics in this paper. The results are as follows. L. brachystachya with one stolon is the most one and its proportion is 60. 47 %. The proportion of L. brachystachya with four stolons is 6.98%. During growing season of alpine meadow, the height, root length and leaf number of L. brachystachya genet is 4.03 cm, 9.11 cm, and 7.98, respectively. The height, root length and leaf number of L. brachystachya ramet is 0.85 cm, 2. 73 cm, and 3.08, respectively. The leaf number on the stolon, stolon length, specific stolon internode weight and stolon thickness of L. brachystachya clone is 12. 54, 15.14 cm, 2.18 mg/cm and 0. 97 mm,respectively. The dry mass of different modules shows the pattern as below： genet〉stolon〉ramet）leaf on the stolon. The root length of genet is decreased and the energy allocation for clonal reproduction has the decreasing trend with the increase of stolon number in L. brachystachya clone. The variations of other parameters of L. brachystachya clone haven＇t obvious patterns.[著者文摘]
Key words:
Lagotis brachystachya; clone; growing characteristics; morphology characteristic; dry mass allocation
基金资助:
中科院“西部之光”人才培养计划项目（cjc0501%）;中科院知识创新工程重要方向项目（KZCX3-SW-339-04）;国家科技攻关计划项目（2005BA901A20）;中科院“百人计划”项目（0429091211）;青海省重点科技攻关项目（2005-N-117）
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