Source-sink Exchange During the Growth and Development of <i>Pleione formosana</i>
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2023, Vol. 44 ›› Issue (11): 2330-2342.DOI: 10.3969/j.issn.1000-2561.2023.11.022

• Plant Cultivation, Physiology & Biochemistry • Previous Articles     Next Articles

Source-sink Exchange During the Growth and Development of Pleione formosana

HAN Ru1, YOU Le1, JIANG Mingtao2, WANG Dekai3, CHEN Ni1, ZHAI Junwen1, WU Shasha1,*()   

  1. 1. College of Landscape Architecture and Art, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
    2. Xiamen Municipal Works and Gardens Administration Bureau, Xiamen, Fujian 361001, China
    3. College of Life Science and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2022-11-07 Revised:2022-11-29 Online:2023-11-25 Published:2023-12-08
  • Contact: *WU Shasha,E-mail:shashawu1984@126.com

Abstract:

The specific transport routes of photosynthetic compounds affect the resource allocation of nutrients at different growth stages. The most important is to affect the quality of flowering and fruit, and promote the artificial cultivation and production of ornamental plants. In this study, Pleione formosana, an endangered species, was used as the material, carboxylfluorescein (CFDA) tracer and laser scanning confocal microscopy were used to study the assimilate transport directions in four different growth and development periods, namely, dormancy period, blossom period, vigorous growth period and half dry period to understand the function of source and reservoir of different organs in different periods. During the dormancy period, assimilates were introduced from mother pseudobulb to bulb plate and finally transported to bud for the growth and development of new bud. In the blossom period, the assimilates were transported irreversibly from the mother bulb to the flower organs to ensure the quantity and quality of flowering. In the vigorous growth period, the assimilates mainly supplied the growth of the leaf and new bulbils at the apex of the mother pseudobulb. In the half dry period, the two daughter pseudobulbs competed with each other for nutrients from the mother pseudobulb, while some assimilates were still used to satisfy the growth and development of apex bulbils. The results showed that pseudobulb, as a nutrient storage organ, played an important role in assimilate distribution and generation regeneration succession in four different periods. Its special function would provide reference for artificial cultivation and commercial production in the future.

Key words: Pleione formosana, pseudobulb, CFDA, source and sink exchange

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