In vitro inhibition of pigmentation and fiber development in colored cotton

Abstract

Abstract:Colored cotton has naturally pigmented fibers. The mechanism of pigmentation in cotton fiber is not well documented. This experiment was conducted to study the effects of respiratory chain inhibitors, i.e., rotenone and thiourea, on pigmentation and fiber development in colored cotton. After 1 d post-anthesis, ovaries were harvested and developing ovules were cultured on the liquid medium containing different concentrations of rotenone and thiourea for 30 d. The results demonstrate that both respiratory inhibitors reduced fiber length and ovule development under ovule culture conditions, and the inhibition efficiency of rotenone was much higher than that of thiourea. Rotenone and thiourea also showed significant effects on fiber pigment (color) development in colored cotton. In green cotton fiber, rotenone advanced fiber pigment development by 7 d at 200 μmol/L, while thiourea inhibited fiber pigmentation at all treatment levels (400, 600, 800, 1 000, and 2 000 μmol/L). Both respiratory inhibitors, however, had no significant effects on pigmentation of brown cotton fibers. The activities of cytochrome c oxidase (COX) and polyphenol oxidase (PPO) decreased significantly with increasing levels of both respiratory inhibitors. It is suggested that both respiratory inhibitors have important roles in deciphering the mechanism of pigmentation and fiber development in colored cotton.

Genetic divergence of colored cotton based on inter-simple sequence repeat (ISSR) markers

“…White fibers are desirable for most Brazilian textile industries, because they provide a uniform substrate for dyeing and finishing. Onto new market trends, other niches have emerged, such as the naturally colored fibers, that required no or less dying in the textile processing, reducing the pollution to the environment due to minor residual chemical toxicant (Xiao et al, 2007;Yuan et al, 2012;Feng et al, 2013). This technology is a differentiated product and therefore with higher valueadded, representing an alternative model of innovation, to promote social and sustainable transformations (Cavalcanti, 2012).…”

Genetic mapping of fiber color genes on two brown cotton cultivars in Xinjiang

“…Naturally colored cotton, or colored cotton, appears as brown or green colored fiber during the fiber development process. Requiring no or less dying in the textile processing, colored cotton reduces the pollution to the environment; moreover, free from residual chemical toxicant, garments made from colored cotton are more comfortable, softer and healthier for human bodies (Yuan et al 2012 ). However, colored cotton is generally inferior to white cotton, especially with respect to fiber quality, including shorter, weaker fiber and lower micronaire.…”