Fluorescence from abnormally sterile pollen of the japanese apricot

Shinnosuke Mori, Shuichi Shimma, Hiromi Masuko-Suzuki, Masao Watanabe, Tetsu Nakanishi, Junko Tsukioka, Katsumi Goto, Hiroshi Fukui, Nobuhiro Hirai

研究成果: Article査読

抄録

We observed trees of the Japanese apricot, Prunus mume ‘Nanko’ (Rosaceae), bearing two types of flowers: 34% had blue fluorescent pollen under UV irradiation, and 66% had non-fluorescent pollen. The fluorescent pollen grains were abnormally crushed, sterile, and devoid of intine and pollenkitt. The development of microspores within anthers was investigated: in the abnormally developed anthers, tapetal cells were vacuolated at the unicellular microspore stage, and fluorescent pollen was produced. Compounds responsible for the blue fluorescence of pollen were identified as chlorogenic acid and 1-O-feruloyl-β-D-glucose. The anthers with fluorescent pollen contained 6.7-fold higher and 3.8-fold lower amounts of chlorogenic acid and N1,N5,N10-tri-p-coumaroylspermidine, respectively, compared to those with non-fluorescent pollen. The tapetal vacuolization, highly accumulated chlorogenic acid, and deficiency of N1,N5,N10-tri-p-coumaroylspermidine imply that low-temperature stress during the early unicellular microspore stage caused a failure in microsporogenesis. Furthermore, potential effects of the visual difference on the bee behavior were also discussed through the colorimetry. The sterility, likely induced by low-temperature stress, and the preference of honeybees for fluorescence may reduce the pollination efficiency of P. mume.

本文言語English
ページ(範囲)355-366
ページ数12
ジャーナルPlant Biotechnology
38
3
DOI
出版ステータスPublished - 2021

ASJC Scopus subject areas

  • バイオテクノロジー
  • 農業および作物学
  • 植物科学

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