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ARS Home » Plains Area » Manhattan, Kansas » Center for Grain and Animal Health Research » Hard Winter Wheat Genetics Research » Research » Publications at this Location » Publication #421166
Research Project: Mobilizing Genetic Resources and Technologies for Breeding Profitable, Resilient, and Nutritious Hard Winter Wheat

Location: Hard Winter Wheat Genetics Research

Title: Impact of phytohormones on wheat resistance to Hessian fly under heat stress

Author
item MALDANI, MOHAMED - Fayetteville State University
item JACKSON, JANAIA - Fayetteville State University
item CAPERS, DESTINY - Fayetteville State University
item RANIA, NAZIR - Fayetteville State University
item GORE, CAILEE - Fayetteville State University
item PANKEY, HANNAH - Fayetteville State University
item WALKER, JOHNAE - Fayetteville State University
item Chen, Ming Shun
item ZHU, LIECENG - Fayetteville State University

Submitted to: Frontiers in Agronomy
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/18/2024
Publication Date: 7/30/2024
Citation: Maldani, M., Jackson, J., Capers, D., Rania, N., Gore, C., Pankey, H., Walker, J., Chen, M., Zhu, L. 2024. Impact of phytohormones on wheat resistance to Hessian fly under heat stress. Frontiers in Agronomy. https://doi.org/10.3389/fagro.2024.1331871.
DOI: https://doi.org/10.3389/fagro.2024.1331871

Interpretive Summary: The Hessian fly (HF, Mayetiola destructor) is one of the most destructive pests of wheat and wheat-related cereals. Host resistance and/or susceptibility to HF are often affected by the levels of phytohormones in plants. In this study, we examined the impact of phytohormones on wheat resistance to HF by externally applying phytohormones, including salicylic acid (SA), jasmonic acid (JA), auxin (indole acetic acid, IAA), and 12-oxophytodienoic acid (OPDA) to wheat seedlings under control and heat conditions. We found that external SA, OPDA, and IAA can partially prevent the loss of wheat resistance to HF under heat stress in a fly density-dependent manner. Our findings revealed the complexity of the impact of phytohormones on plant resistance to insects under different environmental conditions. Our long-term goals are to reveal the factors that affect the stability of plant resistance at elevated temperatures and develop durable resistance plants under global climate change.

Technical Abstract: The Hessian fly (HF, Mayetiola destructor) is one of the most destructive pests of wheat and wheat-related cereals. Wheat resistance and/or susceptibility to HF are often affected by the levels of phytohormones in plants. In this study, we tested the impact of phytohormones on wheat resistance to HF by externally applying phytohormones, including salicylic acid (SA), jasmonic acid (JA), auxin (indole acetic acid, IAA), and 12-oxophytodienoic acid (OPDA) to wheat seedlings under control and heat conditions. We found that the external application of phytohormones SA, OPDA, and IAA partially prevent the loss of wheat resistance to HF under heat stress in a fly density-dependent manner. Specifically, the application of SA, OPDA, and IAA, respectively, partially prevent the loss of wheat resistance to HF under low insect density under heat stress, but did not alter the resistance under high fly density. On the other hand, the application of JA did not affect the resistance of the wheat plants to HF under heat conditions, regardless of insect density. Our findings revealed the complexity of the impact of phytohormones on plant resistance to insect pests under different environmental conditions.