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CcCIPK14 Gene Function Analysis to Illuminate the Efficient Root Transgenic System

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Auxin-Induced Adventitious Rooting in Pepper Involves CaLBD16: Functional Evidence from Tomato Overexpression.

Xinhao Zhang¹, Bingqian Tang^1,2, Hongyan Shen³

¹Engineering Research Center for Germplasm Innovation and New Varieties Breeding of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China.

Plants (Basel, Switzerland)

|May 4, 2026

Summary

Adventitious root formation in pepper plants is crucial for asexual reproduction. This study identifies CaLBD16, regulated by CaARF6 and CaWOX11, as a key molecular player in auxin-induced root development.

Keywords:

CaLBD16 adventitious root auxin pepper

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Area of Science:

Plant Biology
Molecular Biology
Agricultural Science

Background:

Adventitious root formation is vital for plant asexual reproduction.
Research on this process in pepper plants is limited.
Auxin is a known promoter of adventitious root development.

Purpose of the Study:

To elucidate the molecular mechanism of auxin-induced adventitious root formation in pepper.
To identify key regulatory genes involved in this process.

Main Methods:

Exogenous auxin treatment of pepper plants.
Gene expression analysis to identify downstream targets of auxin signaling.
Investigating the roles of candidate genes (CaLBD16, CaARF6, CaWOX11) in root formation.

Main Results:

Exogenous auxin significantly promotes adventitious root formation in pepper.
CaLBD16 was identified as a positive regulator acting downstream of auxin signaling.
CaARF6 and CaWOX11 mediate auxin signal transduction to CaLBD16 and are essential for root formation.

Conclusions:

A molecular mechanism for auxin-induced adventitious root formation in pepper involving CaLBD16, CaARF6, and CaWOX11 has been uncovered.
These findings provide valuable insights for improving pepper propagation and production.