Phenylpropanoid metabolism and pigmentation show divergent patterns between brown color and green color cottons as revealed by metabolic and gene expression analyses

[Background] Naturally-colored cotton has become increasingly popular because of their natural properties of coloration, UV protection, flame retardant, antibacterial activity and mildew resistance. But poor fiber quality and limited color choices are two key issues that have restricted the cultivation of naturally-colored cotton. To identify the possible pathways participating in fiber pigmentation in naturally-colored cottons, five colored cotton accessions in three different color types (with green, brown and white fiber) were chosen for a comprehensive analysis of phenylpropanoid metabolism during fiber development.

[Result] The expression levels of flavonoid biosynthesis pathway genes in brown cotton fibers were significantly higher than those in white and green cotton fibers. Total flavonoids and proanthocyanidin were higher in brown cotton fibers relative to those in white and green cotton fibers, which suggested that the flavonoid biosynthesis pathway might not participate in the pigmentation of green cotton fibers. Further expression analysis indicated that the genes encoding enzymes for the synthesis of caffeic acid derivatives, lignin and lignan were activated in the developing fibers of the green cotton at 10 and 15 days post-anthesis.

[Conclusion] Our results strengthen the understanding of phenylpropanoid metabolism and pigmentation in green and brown cotton fibers, and may improve the breeding of naturally-colored cottons.

[Title] Phenylpropanoid metabolism and pigmentation show divergent patterns between brown color and green color cottons as revealed by metabolic and gene expression analyses

[Authors] LI Zhonghua, SU Qian, XU Mingqi, YOU Jiaqi, KHAN Anam Qadir, LI Junyi, ZHANG Xianlong, TU Lili & YOU Chunyuan

Journal of Cotton Research 2020, 327

https://doi.org/10.1186/s42397-020-00069-x

WCRC-7 WEBINAR on ‘Cotton and Climate Change’ 4 November 2020

COTTON WEBINARS
WCRC-7 Plenary Lecture Series

The ICAC and ICRA are delighted to announce the second COTTON WEBINAR to be held at 7.30 to 9.30 AM (Eastern Time, Washington DC) on 4 November 2020. The webinar lectures will feature two presentations (30 min) each day by eminent globally renowned experts followed by a Q& A session. The lectures will be translated simultaneously into French and Spanish. Zoom-Pro has a provision for language preference options which are easy to access. 
COTTON AND CLIMATE CHANGE 
Time & Date: 7.30 to 9.30 AM (Eastern time, Washington DC) 4 November 2020

Dr. K. Raja ReddyProfessor, Environmental Plant Physiology, Mississippi State University, USA
Topic: Clime Change -Physiological implications and Challenges

Dr. Michael Bange, Former Chief Scientist, CSIRO Australia
Topic: Climate Change -Management Implications and Challenges

Please find the first flyer of the event attached herewith
Link to join the meeting, ID and password are provided below
Best Regards
Keshav Kranthi


Join Zoom Meeting
https://us02web.zoom.us/j/84140126878?pwd=SWV2MmljS0sxdjJnMFVBZHY1ZlBUdz09

Meeting ID: 841 4012 6878
Passcode: 819742