花齡對兔眼藍莓自花授粉花粉管動力學和胚囊壽命的影響

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關(guān)鍵詞藍莓;花齡；自花授粉;花粉管動力學;胚囊壽命

中圖分類號S663.9 文獻標識碼A 文章編號1007-7731（2025）09-0015-05

DOI號10.16377/j.cnki.issn1007-7731.2025.09.004

AbstractTo investigate the effectofflower ageon the growth ofself-pollinated pollen tubesand the lifespan of embryo sacs in rabbit-eye blueberries，‘Powderblue’rabbit-eye blueberrywas usedas experimental material，the flowersof differentflowerages （O，1，2，3，4，5，6，and7daysaftermaleremoval） wereself-pollinated.Andthethe germination of pollen，growth of pollen tube，and embryosac longevity development were observed.The results showed thatflowerage hadasignificant effecton the dynamicsof pollentubes inself-polliationrabbit-eye blueberies.During the ballon flowering period（Odaysafter male removal），self-polination delayed the germination of pollen tubes，but theproportionof styleswith pollen tube growth tothebase was the highest.The larger theflowerage，the lower the proportion of styles with pollen tubes growing to the base.Theratio of callose in theembryo sac increased with the increase of theageofself-pollnating flowers，among them，theratioof callus formation intheovules was lowerfromOto 1dayafter maleremoval，indicating thattheolder theflowerage，themoreseverethedegenerationofovules in the ‘Powderblue’rabbit-eye blueberry. Comprehensive analysis showed that pollination during the ballon flowering period of‘Powderblue’rabbit-eye blueberry can alleviate self incompatibility to a certain extent.

Keywords blueberry; flower age; self-pollination; pollen tube dynamics; embryo sac longevity

自交不親和是一種廣泛存在于開花植物中的生殖隔離現(xiàn)象，可有效阻止自交，促進雜交，維持基因多樣性，保持高度雜合性，是維持植物多樣性的重要驅(qū)動力。（剩余5120字）