Factors affecting fruit and seed production of Paeonia ostii "Feng Dan", an economically important oil tree
文献类型: 外文期刊
作者: Cao, Guo-Xing 1 ; Lin, Hong-Qiang 2 ; Cheng, Yue-Hong 2 ; Wang, Xie 3 ;
作者机构: 1.Sichuan Agr Univ, Dept Forestry, Chengdu 611130, Peoples R China
2.Wolong Natl Nat Reserve Adm Bur, Wenchuan, Peoples R China
3.Sichuan Acad Agr Sci, Soil & Fertilizer Res Inst, Chengdu, Peoples R China
关键词: attractive traits; female reproduction; flowering phenological traits; Paeonia ostii; pollen limitation
期刊名称:PLANT SPECIES BIOLOGY ( 影响因子:1.528; 五年影响因子:2.0 )
ISSN: 0913-557X
年卷期: 2021 年 36 卷 2 期
页码:
收录情况: SCI
摘要: Many factors may affect reproduction of animal-pollinated species. In this study, the effects of pollen limitation, attractive traits (flower number, plant height and flower width) and flowering phenological traits (flowering onset, duration and synchrony) on female reproduction, as well as the patterns of variation in fruit and seed production within plants, were investigated in Paeonia ostii "Feng Dan" over two flowering seasons (2018 and 2019). Fruit set was very high (90%), and pollen supplementation did not increase fruit and seed production in either year, indicating no pollen limitation. Fruit set, ovule number per fruit and mean individual seed weight per fruit were not affected by any of the six attractive and phenological traits in either year, whereas seed number per fruit was related to the three attractive traits in one or both years. Seed number per plant was positively affected by the three attractive traits and best explained by flower number in both years, but the effect of each of the three phenological traits on seed number per plant differed between years. Within plants, the fruit set, ovule number, seed set and seed number per fruit declined from early- to late-opening flowers, presumably because of resource preemption, but the mean individual seed weight did not vary across the flowering sequence. Our study shows that attractive traits of Paeonia ostii "Feng Dan" are more important than flowering phenological traits in the prediction of total seed production per plant.
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