棉 花 学 报      Cotton Science     2009，21(6)：456-461

Ultra-structural Observation on Fiber Cell Development of Xinjiang Early-maturing cotton
YAN Hong-ying^1，2，HU Wen-ran¹，FAN Ling^1*
(1.Institute of Nuclear and Biological Technology,Xinjiang Academy of Agricultural Sciences,Urumqi 830091, China；2.College of Agronomy, Xinjiang Agricultural University,Urumqi 830052, China )

Abstract：The Ultra-structural developmental process of fiber cell from early maturing cotton (cv. Xinluzao 36) was observed by using transmission electron microscopy. At 10 DPA, when the primary cell wall of cotton fiber was thin and even thickness, and a big vacuole located at the central of fiber cell, there were many organelles, such as mitochondria, ribosomes and Golgi bodies in the cytoplasm. At 20 DPA, a thin layer of the secondary cell wall formed inside the primary cell wall clearly and a part of the organelles disappeared. Subsequently, the secondary cell wall thickened rapidly. The average thickness increased around 0.139 m per day from 30 DPA to 40 DPA and around 0.47 m per day from 40 DPA to 50 DPA. The secondary cell wall gradually thickened and formed daily growth rings. Then the vacuum inside fiber cell became a narrow gap as the fiber maturing. Results showed that the fiber development process of early-maturing cotton was quite similar to other varieties reported, despite flowering and maturing earlier.
Key words：cotton；fiber development; ultra-structure; transmission electron microscope; DPA (Day
post anthesis)    [Full Text, 1849KB、Fig attached, 8199KB]