Changes in o-Diphenol Oxidase During Fibre Development in Cotton

Kato

et al. 2008

Planta

Section: Introductionmentioning

confidence: 99%

Cu/Zn superoxide dismutases in developing cotton fibers: evidence for an extracellular form

Kato

et al. 2008

Planta

“…In Upland cotton (Gossypium hirsutum L.) the fiber density at 0 days post-anthesis (dpa) has been reported to be about 3,300 fibers per square mm, with a ratio of fiber initials to total epidermal cells of 1:3.7 (Stewart 1975). However, several factors can affect fiber differentiation and growth, including genotypes, phytohormones, temperature, water, light, pollination, and fertilization (Schubert et al 1973;Naithani et al 1981;Thaker et al 1989;Zhang et al 1992;Gokani et al 1998;Dasani and Thaker 2006). Thus fiber density is a plastic quality and has been observed to vary among species or cultivars.…”

Section: Introductionmentioning

confidence: 99%

Fiber initiation development in Upland cotton (Gossypium hirsutum L.) cultivars varying in lint percentage

Guo

Zhang

2008

Euphytica

The ovules at the stage of fiber initiation from -1 to +1 days post-anthesis (dpa) were studied, using scanning electron microscopy (SEM), in five Upland cotton (Gossypium hirsutum L.) cultivars varying in lint percentage from 28.53% to 43.10%. Our results indicated that on -1 days post-anthesis (-1 dpa), fiber cell protrusions were found in all cultivars, but these protrusions varied among different materials and the differences did not correlate with ultimate lint percentage of each cultivar. At 0 days post-anthesis (dpa), a large amount of fiber cell protrusions appeared on the ovular surface of all samples, and these protrusions had been elongated significantly by +1 dpa. Interestingly, fiber density at +1 dpa of almost all samples was always significantly lower than that at 0 dpa except Simian3, the cultivar with the highest lint percentage 43.10%. This observation suggests that with the expanding of the cotton ovular volume, fiber ''diluting'' degree on the ovular surfaces might be related to higher or lower lint percentage. Qiannong465, the cultivar with the lowest lint percentage (28.53%), was found to exhibit the fewest fiber protrusions. Rather, many sunken, morphologically abnormal protrusions were observed on the ovular surface at 0 dpa. Correlation analysis suggested that either fiber protrusion density at 0 dpa or fiber elongation density at +1 dpa had a highest positive correlation with lint percentage, secondly with lint index. The grey relational analysis was essentially consistent with these findings. Thus we have identified two important parameters that could provide invaluable predictive information for cotton breeding.

“…As the fiber cells progress from the elongation to the SCW stage, a number of proteins have been reported to change. These proteins have been measured by immunological methods (Kloth, 1989;John and Crow, 1992;Dixon et al, 1994), by enzymatic activity (Jasdanwala et al, 1977;Naithani et al, 1981;Basra and Malik, 1983;Wa ¨fler and Meier, 1994), and by binding of cofactors (Amor et al, 1991) and inhibitors (Delmer et al, 1987). For example, Kloth (1989) found that the tubulin proteins increased proportionately with elongation and then remained present during the SCW synthesis.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Protein Profiles during Cotton (Gossypium hirsutum L.) Fiber Cell Development with Partial Sequences of Two Proteins

Ferguson

Turley

Triplett

et al. 1996

J. Agric. Food Chem.

Two-dimensional polyacrylamide gel electrophoresis was used to compare the protein profiles of cotton (Gossypium hirsutum L.) fiber cells at two developmental stages. In the first stage, the cells are elongating and synthesizing primary cell walls [14 days postanthesis (DPA)]; in the second stage, the cells are beginning secondary cell wall synthesis [21 DPA]. Forty-five proteins were found that differed in amount between the two stages; these proteins were characterized by their molecular weights, isoelectric points, and relative quantities at each stage. Two of the proteins that were present in higher amounts in the 21-DPA fiber were further studied by N-terminal amino acid sequencing. One of these proteins was identified as a cytoplasmic malate dehydrogenase on the basis of N-terminal sequence similarity. These results provide a foundation for further studies of the proteins that participate in cotton fiber development. Keywords: Gossypium hirsutum L.; Malvaceae; cotton; fiber; two-dimensional electrophoresis; proteins; malate dehydrogenase