Root-type-specific plasticity in response to localized high nitrate supply in maize (Zea mays)

Annals of Botany
Peng YuChunjian Li

Abstract

Shoot-borne roots contribute to most of the nutrient uptake throughout the life cycle of maize (Zea mays). Compared with numerous studies with embryonic roots, detailed information on the phenotypic plasticity of shoot-borne roots in response to a heterogeneous nitrogen supply is scarce. The present study therefore provides a comprehensive profile of fine-scale plastic responses of distinct root types to localized high nitrate supply. Seedlings of the maize inbred line B73 were grown in split-root systems. The anatomy and morphological plasticity of the primary root and the roots initiated from the 2nd, 5th and 7th shoot nodes, and their lateral roots, were studied in response to local high nitrate supply to one side of the root system. In contrast to the insensitivity of axial roots, local high nitrate supply increased the length of 1st-order lateral roots on the primary root and the three whorls of shoot-borne roots at different growth stages, and increased the density of 1st-order lateral roots on the 7th shoot-borne root after silking. The length and density of 2nd-order lateral roots on the three whorls of shoot-borne roots displayed a more flexible response to local high nitrate than 1st-order lateral roots. Root diameter...Continue Reading

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Citations

Feb 26, 2016·Journal of Integrative Plant Biology·Christopher N ToppZhengbin Liu
Oct 31, 2016·Trends in Plant Science·Peng YuFrank Hochholdinger
Jan 24, 2020·Journal of Experimental Botany·Zhongtao Jia, Nicolaus von Wirén
May 8, 2020·Plant & Cell Physiology·Zhaojun LiuNicolaus von Wirén
Mar 20, 2019·Frontiers in Plant Science·Luis O Duque, Arthur Villordon
Jul 25, 2019·Frontiers in Plant Science·Jieping LiLixing Yuan
Jan 9, 2021·Current Opinion in Plant Biology·Ashley N HostetlerErin E Sparks
Jan 26, 2021·Plant Science : an International Journal of Experimental Plant Biology·Ting-Ting ZhangYu-Jin Hao
Jun 15, 2020·Plant Science : an International Journal of Experimental Plant Biology·Sangam L DwivediRodomiro Ortiz

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