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Acta Agron Sin ›› 2011, Vol. 37 ›› Issue (07): 1280-1288.doi: 10.3724/SP.J.1006.2011.01280


Observation of Differentiation and Pigment Deposition Process in Colored Cotton Fibers

ZHANG Mei-Ling,SONG Xian-Liang,SUN Xue-Zhen*,WANG Zhen-Lin*,ZHAO Qing-Long,LI Zong-Tai,JI Hong,XU Xiao-Long   

  1. Agronomy College, Shandong Agricultural University / State Key Laboratory of Crop Biology, Tai’an 271018, China
  • Received:2010-11-17 Revised:2011-03-06 Online:2011-07-12 Published:2011-04-12
  • Contact: 孙学振, E-mail: sunxz@sdau.edu.cn, Tel: 0538-8242487; 王振林, E-mail: zlwang@sdau.edu.cn, Tel: 0538-8241359

Abstract: To further know the differentiation differencesand the process of pigment deposition between colored cotton fibers and normal white cotton fibers as well as in colored cotton fibers, morphological changes of ovule epidermal cells, fibers early development, and the process of pigment deposition were investigated inthree cotton (Gossypium hirsutum L.) cultivars (colored cotton Zongxu 1 (ZX1), Longlümian 2 (G-7), and white cotton Lumianyan 28 (LMY28)) using optical microscopy, scanning electron microscopy and transmission electron microscopy. The results showed that the central part of the ovule epidermal cells was began to differentiate at –1 DPA (days post anthesis, DPA). There were protuberances of ovule fiber cells at 0 DPA. The number and volume of protuberances increased at 1 DPA, when the fiber cells of LMY28 had the elongated trends. In addition, fiber cells already elongated at 3 DPA.In summary, it showed that LMY28 was the best, followed by ZX-1, and G-7 was the worst in the degree of differentiation, the number of protuberance, as well as, the level of development and elongation. Pigment forming time and depositing position showed signification differences in the fibers development process of ZX-1 and G-7’s. That is to say, the pigment formation of G-7 is earlier than that of ZX-1, and the pigment of G-7 deposited in both lumen and the inner secondary wall, while the pigment of ZX-1 only deposited in lumen. In conclusion, the poor quality of ZX-1 and G-7 is probably in relation to the later differentiation processes, the smaller numbers of ovule epidermal cells, as well as pigment deposited in fiber development process.

Key words: Colored cotton, Cotton fiber, Differentiation and protuberant, Pigment deposition

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