Corm weight-dependent reproduction of Pinellia ternata
Corm weight-dependent reproduction of Pinellia ternata
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半夏的球茎重量依赖性繁殖
DOI：
10.3719/weed.42.18
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Akiko Nakagaki
中科院分区：
文献类型：
--
作者：
T. Tominaga;Akiko Nakagaki
半夏Pinellia ternata（Thunb.）布赖特是天南星科多年生杂草，通过种子、在叶片节和叶柄上产生的珠芽和小球茎繁殖。于1992年4月在一个花园中采集250个球茎，称重后，分别种植在直径11cm ×深10cm的盆中，盆内盛有菜地土壤，1992年10月挖下。随着时间的推移，记录扩展的叶、珠芽和形成的花葶的数量。每个珠芽的重量被单独测量。随着植物的生长，四种不同的叶型依次产生，代表不同的生长阶段。这是心形，耳形，三分和三出复叶阶段。心形叶期的个体很少产生生殖器官。在耳状叶期只有少数个体在叶柄上产生珠芽，而在三叶期几乎所有个体都产生珠芽。三出复叶期的所有个体在叶片节和叶柄上都产生珠芽。开花植株一般为三出复叶，球茎鲜重大于0.79g。球茎重与膨大叶数、珠芽数和珠芽重呈极显著正相关。据推测，这种杂草的繁殖是密切依赖于球茎重量。
Pinellia ternata (Thunb.) Breit. is an Araceae perennial weed and reproduces by seeds, bulbils produced on both lamina joints and petioles, and cormlets. The relationship between its reproductive mode and corm weight was investigated.In April, 1992, two hundred fifty corms were sampled in a flower garden, weighed, planted individually in 11cm diameter ×10cm depth pots filled with soil from a vegetable field and dug up in October, 1992. The number of leaves expanded, bulbils and scapes formed were recorded over time. Weight of each bulbil was measured individually.Four different leaf types were produced in order as the plant grew, representing separate growth stages. These were the cordate, auriculate, tripartite and ternately compound leaf stages. Individuals in the cordate leaf stage seldom produced reproductive organs. Only a few individuals in the auriculate leaf stage produced bulbils on petioles, while almost all of the individuals in the tripartite leaf stage did so. All individuals in the ternately compound leaf stage produced bulbils on both lamina joints and petioles. Flowering plants always had ternately compound leaves and corm fresh weight heavier than 0.79g. Number of leaves expanded, bulbils produced, and bulbil weight were highly related to corm weight. Reproduction of this weed was inferred to be closely dependent on corm weight.