Papers

Peer-reviewed
6 2011

Chlorophenoxyacetic acid and chloropyridylphenylurea accelerate translocation of photoassimilates to parthenocarpic and seeded fruits of muskmelon (Cucumis melo)

JOURNAL OF PLANT PHYSIOLOGY
  • Xin-Xian Li
  • ,
  • Fumiyuki Kobayashi
  • ,
  • Hiromi Ikeura
  • ,
  • Yasuyoshi Hayata

Volume
168
Number
9
First page
920
Last page
926
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1016/j.jplph.2010.11.005
Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG

We compared the effect of p-chlorophenoxyacetic acid (p-CPA) and 1-(2-chloro-4-pyridyl)-3-phenylurea (CPPU) on parthenocarpic and seeded muskmelon (Cucumis melo) fruits in regards to fruit development and the transport of photoassimilates from leaves exposed to (14)CO(2) to the developing fruits. Ten days after anthesis (DAA), the fresh weight, total (14)C-radioactivity and contents of (14)C-sucrose and (14)C-fructose were higher in the CPPU-induced parthenocarpic fruits than in seeded fruits. However, at 35 DAA, fresh weight and sucrose content in mesocarp, placenta and empty seeds of the parthenocarpic fruits were lower than in seeded fruits. Also, total (14)C-radioactivity and (14)C-sugar content of the parthenocarpic fruits were lower as well as the translocation rate of (14)C-photoassimilates into these fruits. Application of p-CPA to the parthenocarpic fruits at 10 and 25 DAA increased fresh weight and sugar content. Moreover, these treatments elevated the total (14)C-radioactivity, (14)C-sucrose content and the translocation rate of (14)C-photoassimilates. The (14)C-radioactivity along the translocation pathway from leaf to petiole, stem, lateral shoot and peduncle showed a declining pattern but dramatically increased again in the fruits. These results suggest that the fruit's sink strength was regulated by the seed and enhanced by the application of p-CPA. (C) 2011 Elsevier GmbH. All rights reserved.

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Link information
DOI
https://doi.org/10.1016/j.jplph.2010.11.005
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/21168241
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000291899000009&DestApp=WOS_CPL

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