Enhancing auxin accumulation in maize root tips improves root growth and dwarfs plant height

Plant Biotechnology Journal
Zhaoxia LiJuren Zhang

Abstract

Maize is a globally important food, feed crop and raw material for the food and energy industry. Plant architecture optimization plays important roles in maize yield improvement. PIN-FORMED (PIN) proteins are important for regulating auxin spatiotemporal asymmetric distribution in multiple plant developmental processes. In this study, ZmPIN1a overexpression in maize increased the number of lateral roots and inhibited their elongation, forming a developed root system with longer seminal roots and denser lateral roots. ZmPIN1a overexpression reduced plant height, internode length and ear height. This modification of the maize phenotype increased the yield under high-density cultivation conditions, and the developed root system improved plant resistance to drought, lodging and a low-phosphate environment. IAA concentration, transport capacity determination and application of external IAA indicated that ZmPIN1a overexpression led to increased IAA transport from shoot to root. The increase in auxin in the root enabled the plant to allocate more carbohydrates to the roots, enhanced the growth of the root and improved plant resistance to environmental stress. These findings demonstrate that maize plant architecture can be improved by ...Continue Reading

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Citations

Jan 24, 2020·Bulletin of Mathematical Biology·Henry R Allen, Mariya Ptashnyk
Mar 4, 2020·Scientific Reports·Víctor J Cancino-GarcíaClelia De-la-Peña
Dec 3, 2020·Plant Physiology and Biochemistry : PPB·Seyyedeh Atefeh MousaviRainer Schulin
Jan 27, 2021·BMC Plant Biology·Qing YangHong Liao
Jul 1, 2020·Trends in Plant Science·Wei GuoLam-Son Phan Tran
Apr 10, 2021·Journal of Basic Microbiology·Surjit S DudejaErika Kothe
Aug 6, 2021·Plant Cell Reports·Smita Chaudhry, Gagan Preet Singh Sidhu
Aug 15, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Gangjun ZhaoHaibin Wu

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Datasets Mentioned

BETA
GSE57291

Methods Mentioned

BETA
transgenic
PCR
Dot blot
environmental stress
Illumina sequencing

Software Mentioned

PlantCARE
Clustal W2
KinasePhos
MEGA

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