Interspecies Evolution and Networks Investigation of the Auxin Response Protein (AUX/IAA) Family Reveals the Adaptation Mechanisms of Halophytes Crops in Nitrogen Starvation Agroecological Environments

Haomiao Yu, Yuan Yuan, Sijiao Wang, Guoming Wu, Haishen Xu, Jianglan Wei, Le Ju, Yulin Huang and Hui Chen
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Haomiao Yu: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Yuan Yuan: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Sijiao Wang: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Guoming Wu: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Haishen Xu: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Jianglan Wei: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Le Ju: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Yulin Huang: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China
Hui Chen: College of Life Science, Sichuan Agricultural University, Ya’an 625014, China

Agriculture, 2021, vol. 11, issue 8, 1-23

Abstract: The maintenance of adaptability to the exposure to agroecological extreme environments is generally a feature after the long-term domestication of crops. Auxin influences plant growth in all environments. At present, the research on the auxin response factors ( ARFs ) has been very in-depth. However, there is still a large gap in the research on the origin, evolution, and regulatory networks of the Auxin-responsive protein (AUX/IAA) family. Here, we identified 495 AUX/IAAs from 19 representative species covering aquatic algae to angiosperms and found that they originated from early bryophytes and mainly expanded by polyploidy in angiosperms. In the domesticated crop quinoa, the evolutionary model of the IAA family is relatively independent and forms a robust regulatory network with auxin signals and energy metabolism pathways. In the nitrogen-deficient environment, CqIAAs ( Chenopodium quinoa AUX/IAAs), auxin signals, and TCA pathway genes induced expression in young roots to promote root elongation and could regulate the balance of carbon and nitrogen metabolism to maintain the adaptation of early seedlings in poor environments. Furthermore, a rapidly evolving CqIAA ( AUR62011942 ) not only has different expression levels in two quinoa seeds but also has a significant stress response when seedlings face nitrogen deficiency stress, which may be a key factor in the adaptive regulation of the barren environment. Our research provides valuable clues for understanding the origin, evolution, and functional innovation of auxin signaling and also provides a reference for future agricultural breeding in the context of global environmental changes.

Keywords: AUX/IAA family; plant population; quinoa; nitrogen starvation; regulatory networks; system evolution (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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