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Aluminium is essential for root growth and development of tea plants (Camellia sinensis).


ABSTRACT: On acid soils, the trivalent aluminium ion (Al3+ ) predominates and is very rhizotoxic to most plant species. For some native plant species adapted to acid soils including tea (Camellia sinensis), Al3+ has been regarded as a beneficial mineral element. In this study, we discovered that Al3+ is actually essential for tea root growth and development in all the tested varieties. Aluminum ion promoted new root growth in five representative tea varieties with dose-dependent responses to Al3+ availability. In the absence of Al3+ , the tea plants failed to generate new roots, and the root tips were damaged within 1 d of Al deprivation. Structural analysis of root tips demonstrated that Al was required for root meristem development and activity. In situ morin staining of Al3+ in roots revealed that Al mainly localized to nuclei in root meristem cells, but then gradually moved to the cytosol when Al3+ was subsequently withdrawn. This movement of Al3+ from nuclei to cytosols was accompanied by exacerbated DNA damage, which suggests that the nuclear-targeted Al primarily acts to maintain DNA integrity. Taken together, these results provide novel evidence that Al3+ is essential for root growth in tea plants through maintenance of DNA integrity in meristematic cells.

SUBMITTER: Sun L 

PROVIDER: S-EPMC7383589 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Aluminium is essential for root growth and development of tea plants (Camellia sinensis).

Sun Lili L   Zhang Mengshi M   Liu Xiaomei X   Mao Qianzhuo Q   Shi Chen C   Kochian Leon V LV   Liao Hong H  

Journal of integrative plant biology 20200515 7


On acid soils, the trivalent aluminium ion (Al<sup>3+</sup> ) predominates and is very rhizotoxic to most plant species. For some native plant species adapted to acid soils including tea (Camellia sinensis), Al<sup>3+</sup> has been regarded as a beneficial mineral element. In this study, we discovered that Al<sup>3+</sup> is actually essential for tea root growth and development in all the tested varieties. Aluminum ion promoted new root growth in five representative tea varieties with dose-dep  ...[more]

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