Phylogenetic analyses and agronomical characteristics on parthenocarpy in different Cucurbitaceae genera using cross-pollination
Phylogenetic analyses and agronomical characteristics on parthenocarpy in different Cucurbitaceae genera using cross-pollination
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DOI：
10.1016/j.scienta.2021.110210
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发表时间：
2021-11
影响因子：
4.3
通讯作者：
K. Sugiyama;H. Shimura;D. Kami;N. Murata;Midori Yoshida;A. Suzuka;Kohei Nagaoka;Y. Jitsuyama;Takashi Suzuki
中科院分区：
文献类型：
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作者：
K. Sugiyama;H. Shimura;D. Kami;N. Murata;Midori Yoshida;A. Suzuka;Kohei Nagaoka;Y. Jitsuyama;Takashi Suzuki
在瓜属9属植物（Citrullus, Lagenaria, Benincasa, Cucumis, Diplocyclos, Coccinia, Luffa, trichosansansanand momordica）的属间传粉诱导孤雌结实的研究中，我们发现与另一个属的花粉授粉后可以诱导孤雌结实。仅用葫芦花粉诱导西瓜雌花孤雌结核；这两个物种被认为是Benincaseae部落中亲缘关系最密切的物种，葫芦花粉具有诱导西瓜坐果的特定因子。在其他物种中，孤雌性繁殖不仅发生在亲缘关系较近的属之间，也发生在远亲属之间。接受不同种类花粉的甜瓜和苦瓜雌花均未发生单性核化。通过对雌蕊花粉管伸长的观察，我们发现在某些物种中，花粉管伸长与孤雌核诱导并不一定相关。大多数物种只有在授粉时才能结实，这表明花粉萌发和花粉管伸长产生了诱导果实增大的信号。我们认为，信号的接收和转导取决于雌蕊和花粉的来源，而诱导孤雌核的因素存在于雄性和雌性器官中。异属花粉授粉后的孤雌核现象在葫芦科植物中普遍存在，但在其他植物科中尚未发现。讨论了葫芦科植物中这种独特的孤雌生殖过程的相关因素。
In a study of parthenocarpy induction after intergeneric pollination between plants belonging to nine cucurbit genera (Citrullus, Lagenaria, Benincasa, Cucumis, Diplocyclos, Coccinia, Luffa, TrichosanthesandMomordica), we found that parthenocarpy was induced after pollination with pollen from another genus. Parthenocarpy was induced in female flowers of watermelon only with pollen of bottle gourd; the two species are considered to be the most closely related among species in tribe Benincaseae, and bottle gourd pollens have specific factors that induce fruit set of watermelon. In other species, parthenocarpy was induced not only between closely related genera but also between distantly related genera. Parthenocarpy was not induced in female flowers of melon and bitter melon that received pollen from different species. From observations of pollen tube elongation in the pistil, we found that elongation was not necessarily related to parthenocarpy induction in some species. Most species produced fruit set only when pollinated, suggesting that pollen germination and pollen tube elongation generate a signal(s) to induce fruit enlargement. We consider that reception and transduction of the signal(s) depends on the origin of pistil and pollen and that the factors involved in the induction of parthenocarpy are present in both male and female organs. The phenomenon of parthenocarpy after pollination with pollen from a different genus seems to be conserved widely in Cucurbitaceae, but is not known in other plant families. The factors involved in this unique parthenocarpy in Cucurbitaceae are discussed.