The mechanism of pollination drop withdrawal in Ginkgo biloba L.

被引:27
|
作者
Jin, Biao [1 ]
Zhang, Lei [1 ]
Lu, Yan [1 ]
Wang, Di [1 ]
Jiang, Xiao X. [1 ]
Zhang, Min [1 ]
Wang, Li [1 ,2 ]
机构
[1] Yangzhou Univ, Coll Hort & Plant Protect, Yangzhou 225009, Jiangsu, Peoples R China
[2] Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China
来源
BMC PLANT BIOLOGY | 2012年 / 12卷
基金
中国国家自然科学基金;
关键词
SACCATE POLLEN; PODOCARPACEAE; MORPHOLOGY; SECRETIONS; ORIENTALIS; CAPTURE; BIOLOGY; CONE;
D O I
10.1186/1471-2229-12-59
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Background: The pollination drop (PD) is a characteristic feature of many wind-pollinated gymnosperms. Although accumulating evidence shows that the PD plays a critical role in the pollination process, the mechanism of PD withdrawal is still unclear. Here, we carefully observed the PD withdrawal process and investigated the underlying mechanism of PD withdrawal, which will aid the understanding of wind-pollination efficiency in gymnosperms. Results: In Ginkgo biloba, PDs were secreted on the micropyle during the pollination period and persisted for about 240 h when not pollinated under laboratory conditions. The withdrawal of an isolated PD required only 1 h for evaporation, much less than a PD on the living ovule, which required 100 h. When pollinated with viable pollen, PDs withdrew rapidly within 4 h. In contrast, nonviable pollen and acetone-treated pollen did not cause PD withdrawal. Although 100% relative humidity significantly inhibited PD withdrawal, pollinated PDs still could withdraw completely within 48 h. Pollen grains of Cycas revoluta, which are similar to those of G. biloba, could induce PD withdrawal more rapidly than those of two distantly related gymnosperms (Pinus thunbergii and Abies firma) or two angiosperms (Paeonia suffruticosa and Orychophragmus violaceus). Furthermore, pollen of G. biloba and C. revoluta submerged immediately when encountering the PD, then sank to the bottom and entered the micropyle. The saccate pollen of P. thunbergii and A. firma submerged into the PD, but remained floating at the top and finally accumulated on the micropyle after PD withdrawal. In contrast, pollen of the angiosperms P. suffruticosa, Salix babylonica, and O. violaceus did not submerge, instead remaining clustered at the edge without entering the PD. Conclusions: We conclude that PD withdrawal is primarily determined by the dynamic balance between evaporation and ovule secretion, of which pollen is a critical stimulator. When conspecific pollen grains were submerged in the PD, ovule secretion was subsequently terminated and active absorption occurred. These processes cooperated to influence PD withdrawal. In addition, pollen grain behavior within PDs varied dramatically among taxa, and PDs played a role in distinguishing and transporting pollen in G. biloba.
引用
收藏
页数:9
相关论文
共 50 条
  • [1] The mechanism of pollination drop withdrawal in Ginkgo biloba L.
    Biao Jin
    Lei Zhang
    Yan Lu
    Di Wang
    Xiao X Jiang
    Min Zhang
    Li Wang
    BMC Plant Biology, 12
  • [2] The behavior of pollination drop secretion in Ginkgo biloba L
    Jin, Biao
    Jiang, Xiaoxue
    Wang, Di
    Zhang, Lei
    Wan, Yinglang
    Wang, Li
    PLANT SIGNALING & BEHAVIOR, 2012, 7 (09) : 1168 - 1176
  • [3] Seed set of Ginkgo biloba L. as related to pollination and its optimum pollination time
    Nakao, Y
    Tateishi, A
    Kawase, K
    Ogata, T
    Shiozaki, S
    Horiuchi, S
    JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE, 1998, 67 (05): : 753 - 758
  • [4] Phytohormone requirements for pollination drop secretion in Ginkgo biloba ovules
    Che, Wanqing
    Mao, Danyang
    Zhang, Tiantian
    Jiang, Bei
    Lu, Zhaogeng
    Wang, Li
    BOTANY, 2021, 99 (05) : 251 - 260
  • [5] Development of microsatellite markers in ginkgo (Ginkgo biloba L.)
    Yan, X. F.
    Lian, C. L.
    Hogetsu, T.
    MOLECULAR ECOLOGY NOTES, 2006, 6 (02): : 301 - 302
  • [6] Botanical briefs the Ginkgo tree -: Ginkgo biloba L.
    McGovern, TW
    Barkley, TM
    CUTIS, 1999, 64 (03): : 154 - 156
  • [7] The Maidenhair tree (Ginkgo biloba, L.).
    Seward, A. C.
    Gowan, J.
    ANNALS OF BOTANY, 1900, 14 (53-56) : 109 - U29
  • [8] Potential effets of ginkgo (Ginkgo biloba, L.) on female reproduction
    Sirotkin, V. Alexander
    REPRODUCTIVE BIOLOGY, 2021, 21 (04)
  • [9] The content of magnesium in the leaves of Ginkgo biloba L.
    Jovic, P
    Kosanovic, M
    Jovicic, A
    Cernak, I
    Dobric, S
    Dragojevic-Simic, V
    MAGNESIUM IN THE ENVIRONMENT AND IN ORGANISMS, 1999, 92 : 117 - 121
  • [10] Phytochemical and medicinal importance of Ginkgo biloba L.
    Mohanta, Tapan Kumar
    Tamboli, Yasinalli
    Zubaidha, P. K.
    NATURAL PRODUCT RESEARCH, 2014, 28 (10) : 746 - 752