褪黑素对蓝莓种子萌发和叶片生理特性的影响

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中图分类号：S663.9 文献标志码：A 文章编号：1002-2910（2025）04-0011-05

Abstract： In order to improve the germination rate of seeds， enhance the vitality of autumn leaves，and accelerate the breeding process of new varieties of blueberry， rabbiteye blueberry varieties cv. Powderblue and Baldwin were used to explore the effects of melatonin on seed germination and physiological characteristics of autumn leaves. The results showed that the germination time of two varieties was different， and melatonin ， ，500 μmol/L ， 1000μmol/L ）induced Baldwin seeds to germinate earlier.The germination rate increased first and then decreased with the increase of melatonin concentration， and the highest germination rate was found on melatonin with the increased germination rate by 20.08% and 15.61% compared with the control in Powderblue and Baldwin， respectively. melatonin also increased the SPAD value and chlorophyll a content of autumn leaves of blueberry， and had a more significant efect on Baldwin seedling. But it had little effect on chlorophyll b， carotenoid content， fresh weight， dry weight and water content of autumn leaves. Thus melatonin has a great application prospect in seed germination and vitality maintenance of autumn leaves， and provides a certain technical reference for the breeding of new varieties of blueberry.

Key Words： melatonin; blueberry; germination; autumn leaves; physiological characteristics

截至2020年，中国蓝莓栽培面积已达到9.588万 hm2 ，总产量78万t[]，但栽培品种多为国外进口品种，具有自主知识产权的品种较少。（剩余6740字）