Fourier transform infrared spectroscopic approach to the study of the secondary cell wall development in cotton fiber |
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Authors: | Noureddine Abidi Luis Cabrales Eric Hequet |
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Institution: | (1) Fiber and Biopolymer Research Institute, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79403, USA |
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Abstract: | Cotton fiber maturity is a major yield component and an important fiber quality trait that is directly linked to the quantity
of cellulose deposited during the secondary cell wall (SCW) biogenesis. Cotton fiber development consists of five major overlapping
stages: differentiation, initiation, polar elongation, secondary cell wall development, and maturation. The transition period
between 16 and 21 dpa (days post anthesis) is regarded to represent a major developmental stage between the primary cell wall
and the SCW. Fourier Transform Infrared spectroscopy was used to investigate the structural changes that occur during the
different developmental stages. The IR spectra of fibers harvested at different stages of development (10, 14, 17, 18, 19,
20, 21, 24, 27, 30, 36, 46, and 56 dpa) show the presence of vibrations located at 1,733 cm−1 (C=O stretching originating from esters or amides) and 1,534 cm−1 (NH2 deformation corresponding to proteins or amino acids). The results converge towards the conclusion that the transition phase
between the primary cell wall and the secondary cell wall occurs between 17 and 18 dpa in fibers from TX19 cultivar, while
this transition occurs between 21 and 24 dpa in fibers from TX55 cultivar. |
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