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An increase in auxin-dominated glandular trichome density and blinin content is the manifestation of the adaptation of Conyza blinii to iron stress
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  • Ming Yang,
  • Tianrun Zheng,
  • Junyi Zhan,
  • Maojia Wang,
  • Min Zhou,
  • Wenjun Sun,
  • Tongliang Bu,
  • Zizhong Tang,
  • Qingfeng Li,
  • Hui Chen
Ming Yang
Sichuan Agricultural University
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Tianrun Zheng
Sichuan Agricultural University
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Junyi Zhan
Nanjing Agricultural University College of Life Sciences
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Maojia Wang
Sichuan Agricultural University
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Min Zhou
Sichuan Agricultural University
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Wenjun Sun
Sichuan Agricultural University
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Tongliang Bu
Sichuan Agricultural University
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Zizhong Tang
Sichuan Agricultural University
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Qingfeng Li
Sichuan Agricultural University
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Hui Chen
Sichuan Agricultural University

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Abstract

Conyza blinin (C. blinii) is a traditional Chinese medicine plant grown in Sichuan, China. C. blinii is suitable for studying the tolerance mechanism of plants to iron because of its high iron content. Our results show that the growth and development of C. blinii is improved under iron at a specific concentration. Iron increased the content of endogenous auxin in C. blinii, improving the glandular trichome (GT) density and the content of blinin, the characteristic diterpene in C. blinii, which may enhance its tolerance to iron stress. We used RNA sequencing analysis to explore the differential gene transcription in C. blinii under iron stress to provide a reference for the study of other iron-sensitive plants. The results showed that most of the key enzymes in the blinin synthesis pathway were upregulated under iron stress. In addition, the process by which C. blinii responds to iron stress through IAA may be related to CbHO-1. Taken together, these results suggest that the increase in GT density and auxin-mediated blinin content improve the growth of C. blinii under iron stress.