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LI Qingxiang, ZHANG Mingru, GU Cuihua, LI Tongpan, WAN Qi, GAO Lei, ZHANG Tingyu, ZHAO Nannan, CAI Yihang. Floral syndrome and breeding system of Stewartia rostrata[J]. Journal of Zhejiang A&F University. doi: 10.11833/j.issn.2095-0756.20210563
Citation: LI Qingxiang, ZHANG Mingru, GU Cuihua, LI Tongpan, WAN Qi, GAO Lei, ZHANG Tingyu, ZHAO Nannan, CAI Yihang. Floral syndrome and breeding system of Stewartia rostrata[J]. Journal of Zhejiang A&F University. doi: 10.11833/j.issn.2095-0756.20210563

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Floral syndrome and breeding system of Stewartia rostrata

doi: 10.11833/j.issn.2095-0756.20210563
  • Received Date: 2021-08-13
  • Accepted Date: 2022-02-21
  • Rev Recd Date: 2022-02-21
  • Available Online: 2022-03-15
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Floral syndrome and breeding system of Stewartia rostrata

doi: 10.11833/j.issn.2095-0756.20210563

Abstract:   Objective  The objective is to study the floral syndrome and breeding system of Stewartia rostrata, so as to provide a scientific basis for its population renewal, artificial reproduction and garden popularization and application.   Method  Taking 3-year-old S. rostrata as material, the characteristics of pollination biology and breeding system were observed and analyzed by observing the floral syndrome and insect visiting characteristics, measuring the pollen viability and stigma acceptability, and calculating the hybridization index (OCI) and pollen-ovule ratio (P/O).   Result  (1) The flowering period of the population was about 17 days from early May to mid and late May, and the single flowering period was about 2 days. (2) The pollen vitality reached the highest on the day of opening, and the single flower bloomed for 24−32 h , the corolla and stamens were easy to fall off, and the pollen was easy to lose vitality after falling off. (3) The stigma was receptive before flowering, lasting for 7 days. The strong pollen vitality and stigma receptivity had a meeting period of 1−2 days. (4) Stigma was higher than anther in bud stage, and anther was higher than stigma after flowering. Both before and after flowering, stamens and pistils had a certain spatial separation. (5) The OCl of S. rostrata was 4 and P/O was 2 108.0−195 525.0. The breeding system was mainly outcrossing and some self compatibility was required for pollination. (6) Bombus sp. was the main pollinator.   Conclusion  S. rostrata has short pollen life, single pollinating insect, and pollination is easily affected by cloudy and rainy weather, so the reproductive process is greatly limited. The floral syndromes such as centralized flowering mode, large amount of pollen, 5-lobed stigma and long receptive period are the basic manifestations of reproductive success. [Ch, 5 fig. 1 tab. 31 ref.]

LI Qingxiang, ZHANG Mingru, GU Cuihua, LI Tongpan, WAN Qi, GAO Lei, ZHANG Tingyu, ZHAO Nannan, CAI Yihang. Floral syndrome and breeding system of Stewartia rostrata[J]. Journal of Zhejiang A&F University. doi: 10.11833/j.issn.2095-0756.20210563
Citation: LI Qingxiang, ZHANG Mingru, GU Cuihua, LI Tongpan, WAN Qi, GAO Lei, ZHANG Tingyu, ZHAO Nannan, CAI Yihang. Floral syndrome and breeding system of Stewartia rostrata[J]. Journal of Zhejiang A&F University. doi: 10.11833/j.issn.2095-0756.20210563
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