Physiological and biochemical changes associated with cotton fibre development

Abstract

Growth kinetics and levels of auxin substances were studied in three cotton cultivars, designated as long, medium and short staple cultivars. Fibre length and dry weight plotted against boll age showed sigmoidal patterns and were fitted to a logistic curve by computer curvilinear regression analysis. The final length of the fibre in different cultivars was the product of the rate of elongation per day and the total period of elongation. Further, considerable overlap between the elongation and the secondary thickening phases was recorded. No relationship between auxin substances and rate of fibre elongation was discernible. The peak levels of auxin substances in all the cultivars were recorded before or about the time when elongation had just started, and it is concluded that the auxin synthesized during the elongation phase is consumed in elongation growth. Thus there is necessarily no relationship between remaining auxin and growth.

Potential Role of Abscisic Acid in Cotton Fiber and Ovule Development

“…1b). Growth analysis of cotton fiber, with respect to its length and dry weight, has been reported earlier from this laboratory (Jasdanwala et al 1977, Naithani et al 1982, Thaker et al 1986. In all of these studies it was shown that the development of cotton fiber can be divided into four distinct phases: initiation, elongation, secondary thickening, and maturation, and that there was a clear-cut overlap between various phases.…”

“…Considerable evidence indicates that phytohormones play a decisive role in fiber development (Beasley and Ting 1973, 1974, Naithani et al 1982. In in vitro culture of ovules it was observed that indoleacetic acid (IAA) plays an important role in fiber development, whereas abscisic acid (ABA) inhibits it (Beasley and Ting 1973).…”

Towards green carbon fibre manufacturing from waste cotton: a microstructural and physical property investigation

“…Dehydration of the cellulosic unit leads to the formation of the double-bonded intermediates [34]. The mass change in fibres starts by lowering the molecular weight [35] and may result in consequently low tensile strength [36]. For temperatures below 300°C, the decomposition proceeded very slowly with only 5 wt.% losses.…”

An efficient protein preparation for proteomic analysis of developing cotton fibers by 2-DE

“…Cotton fibers are single-celled seed trichomes that originate from the outer epidermal layer of ovules [1,2]. These single fiber cells, developing synchronously, elongate dramatically after anthesis and finally attain lengths 1000-to 3000-fold greater than their diameters [3].…”