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Plant Growth Regulation

, Volume 33, Issue 2, pp 117–122 | Cite as

Cell division and cell enlargement in fruit of Lagenaria leucantha as influenced by pollination and plant growth substances

  • Jing Quan YuEmail author
  • Ying Li
  • Ya Rong Qian
  • Zhu Jun Zhu
Article

Abstract

The effects of NAA (naphthaleneacetic acid), GA3 (gibberellic acid), CPPU (N-(2-chloro-4-pyridyl)-N'-phenylurea) and pollination on fruit set, cell division and enlargement were studied in Lagenaria leucantha, an important vegetable. NAA and GA3 were ineffective in inducing parthenocarpy, whereas CPPU induced parthenocarpic fruit significantly larger than fruit that resulted from pollination. Cell division, which occurred during the first 4 days after pollination was not reactivated by NAA or GA3, but was effectively reactivated by CPPU. The cell number of the total cross-section of CPPU-treated fruit was 117.4% of that of pollinated fruit and 154.4% of that of unpollinated at 12 DAA (days after anthesis) respectively. The CPPU-induced parthenocarpic fruit had the largest cell cross-sectional area followed, successively, by pollinated fruit, NAA-treated fruit, GA3-treated fruit and unpollinated fruit. These results indicate that CPPU induced parthenocarpic fruit growth by directly reactivating cell division and expansion.

auxin cell division cell enlargement cytokinin fruit set 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Jing Quan Yu
    • 1
    Email author
  • Ying Li
    • 2
  • Ya Rong Qian
    • 2
  • Zhu Jun Zhu
    • 1
  1. 1.Department of Horticulture, Huajiachi CampusZhejiang UniversityHangzhouChina
  2. 2.Department of Horticulture, Huajiachi CampusZhejiang UniversityHangzhouChina

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