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A novel seed dispersal mode of Apostasia nipponica could provide some clues to the early evolution of the seed dispersal system in Orchidaceae
Evolution Letters ( IF 5 ) Pub Date : 2020-08-02 , DOI: 10.1002/evl3.188
Kenji Suetsugu 1
Affiliation  

Despite being one of the most diverse families, scant attention has been paid to the seed dispersal system in Orchidaceae, owing to the widely accepted notion that wind dispersal is the dominant strategy. However, the indehiscent fruits, with seeds immersed in fleshy tissue, evoke the possibility of endozoochory in Apostasioideae, the earliest diverging lineage of orchids. In the present study, I investigated the seed dispersal system of Apostasia nipponica by direct observation, time‐lapse photography, and investigation of the viability of seeds passing through the digestive tract of orthopterans. This study revealed a previously undocumented seed dispersal system in A. nipponica, in which the cricket, Eulandrevus ivani, and the camel cricket, Diestrammena yakumontana, consume the fruit and defecate viable seeds. Orthopterans are rarely considered seed dispersers, but the gross fruit morphology and pigmentation patterns of some Apostasia species parallel those seen in A. nipponica, suggesting that similar seed dispersal systems could be widespread among Apostasia species. Whether seed dispersal by orthopteran frugivores is common in Apostasioideae warrants further investigation.

中文翻译:

一种新的海棠种子传播方式可能为兰科种子传播系统的早期进化提供一些线索

尽管是最多样化的家族之一,但由于人们普遍认为风传播是主要策略,因此兰花科的种子传播系统很少受到关注。然而,种子散布在肉质组织中的不开裂的果实让人联想起最早的兰花科的Apostasioideae科的内胚乳。在本研究中,我通过直接观察,定时摄影以及对通过直翅类动物消化道的种子生存力的研究,研究了刺槐的种子传播系统。这项研究揭示了A. nipponica先前没有文献记载的种子传播系统,其中which,Eulandrevus ivani和骆驼,Diestrammena yakumontana,食用水果并排泄可行的种子。直翅目昆虫中很少考虑种子传播者,但有些水果总值形态和色素沉着模式Apostasia种平行那些看到A.蓣,这表明类似的种子传播系统中可能普遍存在Apostasia物种。通过直翅目食肉动物散播种子在菊科中是否很普遍,值得进一步研究。
更新日期:2020-09-29
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