The New Mechanism of Controlling Cotton Verticillium Wilt Resistance by Strigolactones was Revealed
Published:10 Feb.2023 Source:BAP
Plant diseases seriously affect crop yield and quality, and pose a great threat to the safe production and ecological security of world grain, cotton and oil. Cotton verticillium wilt is a soil-borne vascular fungal disease caused by Verticillium dahliae Kleb, which is known as the "cancer" of cotton and is one of the main obstacles to the sustainable development of cotton industry. Plant hormones play a key role in regulating plant resistance to biotic and abiotic stresses and growth and development. It is reported that a new plant hormone, strigolactones (SLs), plays an important role in regulating the response of rice, tomato, Arabidopsis and other plants to biological stress.
Recently, Plant Physiology published a research paper entitled “Strigolactones positively regulate Verticillium wilt resistance in cotton via crosstalk with other hormones” online, revealing the new mechanism of SLs regulating cotton verticillium wilt resistance.
The study found that the resistance of cotton to verticillium wilt could be enhanced and decreased by applying the synthetic SLs functional analogue rac-GR24 and the SLs synthesis inhibitor TIS108. Further research found that the expression of the genes GbCCD7 and GbCCD8b encoding the rate-limiting enzyme carotenoid cleavage dioxygenase encoding SLs synthesis was affected by V. dahliae induced and significantly up-regulated.