利用腊叶标本初探豹子花属植物的性表达及其与个体大小的关系

doi:10.7677/ynzwyj201514040

Plant Diversity ›› 2015, Vol. 37 ›› Issue (01): 11-20.DOI: 10.7677/ynzwyj201514040

利用腊叶标本初探豹子花属植物的性表达及其与个体大小的关系

龚强帮1, 李志敏1**, 彭德力2, 牛洋2, 孙航2, 张志强2、3

1 云南师范大学生命科学学院，昆明650092; 2 中国科学院昆明植物研究所东亚植物多样性与生物地理学
重点实验室，昆明650201; 3 中国科学院青藏高原研究所昆明部, 昆明650201

收稿日期:2014-03-13 出版日期:2015-01-25 发布日期:2014-07-17
基金资助:
国家自然科学基金 (31100179; 31360049)；中国科学院“西部之光”人才培养计划“西部博士资助项目”；中国博士后科学基金特别资助 (2012T50787)

Male Flowers and Relationship between Plant Size and Sex Expression in Herbaria of Nomocharis Species (Liliaceae)

GONG Qiang-Bang-1, LI Zhi-Min-1**, PENG De-Li-2, NIU Yiang-2, SUN Hang-2, ZHANG Zhi-Qiang-2、3

1 School of Life Sciences, Yunnan Normal University, Kunming 650092, China; 2 Key Laboratory for Plant Biodiversity and
Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;
3 Institute of Tibetan Plateau Research at Kunming, Chinese Academy of Sciences, Kunming 650201, China

Received:2014-03-13 Online:2015-01-25 Published:2014-07-17
Supported by:
国家自然科学基金 (31100179; 31360049)；中国科学院“西部之光”人才培养计划“西部博士资助项目”；中国博士后科学基金特别资助 (2012T50787)

摘要/Abstract

摘要：

植物性系统进化过程中很少有植物通过雌性败育的方式实现性系统由联合走向分离，然而雄花在百合科植物中大量存在，引起了研究者的关注。本研究利用百合科豹子花属植物的腊叶标本，获取它们的花性别表型、花大小、株高以及分布海拔等信息探讨豹子花属植物的性表达样式，并对样本量较多的开瓣豹子花、云南豹子花、多斑豹子花和豹子花四个种的性表达及其与个体大小的关系进行分析。研究结果表明：1）六种豹子花属植物标本中都有雄花存在；根据雄性花和两性花的不同组合，形成雄性个体、两性花个体，和雄花两性花同株个体三种植株类型；2）个体大小（株高）和分布海拔之间不存在相关关系，和植株性别类型相关，即雄性个体一般显著小于具有雌性功能的两性花个体和雄花两性花同株个体；3）个体大小与花大小、每个个体开花总数和雌花数量成显著的正相关关系，而与每个个体的雄花数量无显著的相关关系。本研究更正了一直以来对豹子花属植物性系统的错误认识，首次报道雄花在豹子花属植物中普遍存在，并指出雄花和雄性个体的出现是大小依赖性分配的结果。同时，以研究实例证明了利用腊叶标本开展植物性系统多样性的可行性。

关键词: 百合科, 个体大小, 花大小, 性系统, 雄花

Abstract:

Despite the general rarity of femalesterile reproductive systems, male flowers are widespread in Liliaceae. Nomocharis (Liliaceae) consists of ca. seven species which have been traditionally classified as hermaphrodite. However, our preliminary investigation suggested that male flowers may occur frequently in this genus. We got data of the flower sex phenotypes, flower size, plant height and altitude by observing and measuring specimens of Nomocharis from several herbaria (PE, KUN, HITBC CDBI) in China, and then used them to determine the sex distribution and to analyze the relationships between plant size and flower size, sex expression. We found that male flowers occurred in all six studied Nomocharis species and different combinations of hermaphroditic and male flowers at plant level resulted in complex sex expression. Of four further studied species, male plants were significantly smaller than plants with hermaphroditic flowers in three species. Plant height, which was not related to altitude, but not sex phenotype has significant effects on flower size. The number of total flowers and hermaphroditic flowers per plant increased with plant size. However, the number of male flowers was independently of size. Our study suggested resources availability (ie. plant size) determined the sex phenotypes of individuals. We highlighted the occurrence of male flowers in genus Nomocharis and suggested further field studies are absolutely necessary. Furthermore, this study provides a case study to better use herbarium specimens as prerequisites for field researches of floral sexual diversity.

Key words: Liliaceae, Plant size, Flower size, Sexual systems, Male flower

中图分类号:

Q 944

龚强帮, 李志敏, 彭德力, 牛洋, 孙航, 张志强. 利用腊叶标本初探豹子花属植物的性表达及其与个体大小的关系[J]. Plant Diversity, 2015, 37(01): 11-20.

GONG Qiang-Bang, LI Zhi-Min, PENG De-Li, NIU Yiang, SUN Hang, ZHANG Zhi-Qiang. Male Flowers and Relationship between Plant Size and Sex Expression in Herbaria of Nomocharis Species (Liliaceae)[J]. Plant Diversity, 2015, 37(01): 11-20.

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利用腊叶标本初探豹子花属植物的性表达及其与个体大小的关系

Male Flowers and Relationship between Plant Size and Sex Expression in Herbaria of Nomocharis Species (Liliaceae)

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