Variation in style length and anther-stigma distance in Ixiolirion songaricum (Amaryllidaceae)
Variation in style length and anther-stigma distance in Ixiolirion songaricum (Amaryllidaceae)
复制标题
Ixiolirion sonaricum（石蒜科）花柱长度和花药柱头距离的变化
DOI：
10.1016/j.sajb.2012.03.011
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发表时间：
2012-07-01
影响因子：
3.1
通讯作者：
Tan, D. Y.
中科院分区：
文献类型：
--
作者：
Jia, J.;Tan, D. Y.
对新疆北方早春短命多年生草本植物准噶尔鸢尾18个居群的花柱长度和花药柱头间距进行了研究。利用套袋试验研究了ASD对自花花粉沉积和结实的影响。通过人工授粉试验，测定了自花授粉、异花授粉和自然授粉的种子产量。同一个体内的多花柱头被夹在两个独立的花药水平之间，没有个体具有接近或反向herkogamy。花柱长度在花间连续变化，导致ASD的变化范围很广。居群中ASD小的花比ASD大的花少。ASD与自花花粉自主沉积和结实率呈负相关，而与自然授粉结实率呈正相关。自然授粉的种子产量高于自花授粉，但低于异花授粉。花柱长度和ASD在花间的变异不是由花柱或雄蕊的伸长引起的。songaricum，不同于文献报道的花柱长度和ASD连续变异的其他种。由Elsevier B.V.代表SAAB出版。
Variation in style length and anther stigma distance (ASD) was investigated in 18 populations of Ixiolirion songaricum, an early-spring ephemeral perennial herb in northern Xinjiang. The effect of ASD on autonomous self-pollen deposition and seed set was assessed using bagging experiments. Seed production under autonomous self-pollination, cross-pollination and natural pollination was determined by manual pollination experiments. Stigmas of multiple flowers within an individual were sandwiched between two separate anther levels, and no individuals possessed approach or reverse herkogamy. Style length varied continuously among flowers, resulting in a wide range of variation in ASD. There were fewer flowers with a small ASD than with a large ASD in populations. ASD was negatively correlated with autonomous self-pollen deposition and seed set, but it was positively correlated with natural pollination seed set. Seed production under natural pollination was higher than that under autonomous self-pollination, but it was smaller than that under cross-pollination. Variation in style length and ASD among flowers was not caused by style or stamen elongation in I. songaricum, which differ from other species reported in literature that have continuous variation in style length and ASD. Published by Elsevier B.V. on behalf of SAAB.