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Aluminium is essential for root growth and development of tea plants (Camellia sinensis).
Journal of Integrative Plant Biology ( IF 9.3 ) Pub Date : 2020-05-15 , DOI: 10.1111/jipb.12942 Lili Sun 1 , Mengshi Zhang 1 , Xiaomei Liu 1 , Qianzhuo Mao 2 , Chen Shi 1 , Leon V Kochian 3 , Hong Liao 1
Journal of Integrative Plant Biology ( IF 9.3 ) Pub Date : 2020-05-15 , DOI: 10.1111/jipb.12942 Lili Sun 1 , Mengshi Zhang 1 , Xiaomei Liu 1 , Qianzhuo Mao 2 , Chen Shi 1 , Leon V Kochian 3 , Hong Liao 1
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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mainly localized to nuclei in root meristem cells, but then gradually moved to the cytosol when Al3+ was subsequently withdrawn.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.
中文翻译：
铝对于茶树（茶树）的根生长和发育至关重要。
在酸性土壤上，三价铝离子（Al 3+）占主导地位，对大多数植物物种具有极高的根际毒性。对于一些适应酸性土壤的本地植物物种，包括茶（茶花），Al 3+被认为是有益的矿质元素。在这项研究中，我们发现Al 3+实际上对所有测试品种的茶根生长和发育至关重要。铝离子促进了五个代表性茶品种的新根生长，并且对Al 3+的利用具有剂量依赖性。在没有Al 3+的情况下，茶树无法产生新的根，并且在铝剥夺后的1 d内，根尖被破坏。根尖的结构分析表明，铝是根分生组织发育和活动所必需的。根中Al 3+的原位morin染色显示，Al主要定位在根分生组织细胞的核中，但随后随后撤出Al 3+时，Al逐渐移至胞质溶胶中。Al 3+从核到细胞质的这种移动伴随着加剧的DNA损伤，这表明以核靶向的Al主要起维持DNA完整性的作用。综上所述，这些结果为Al 3+提供了新颖的证据。 通过维持分生细胞中DNA的完整性，对于茶树的根部生长至关重要。
更新日期：2020-05-15
中文翻译：
铝对于茶树（茶树）的根生长和发育至关重要。
在酸性土壤上，三价铝离子（Al 3+）占主导地位，对大多数植物物种具有极高的根际毒性。对于一些适应酸性土壤的本地植物物种，包括茶（茶花），Al 3+被认为是有益的矿质元素。在这项研究中，我们发现Al 3+实际上对所有测试品种的茶根生长和发育至关重要。铝离子促进了五个代表性茶品种的新根生长，并且对Al 3+的利用具有剂量依赖性。在没有Al 3+的情况下，茶树无法产生新的根，并且在铝剥夺后的1 d内，根尖被破坏。根尖的结构分析表明，铝是根分生组织发育和活动所必需的。根中Al 3+的原位morin染色显示，Al主要定位在根分生组织细胞的核中，但随后随后撤出Al 3+时，Al逐渐移至胞质溶胶中。Al 3+从核到细胞质的这种移动伴随着加剧的DNA损伤，这表明以核靶向的Al主要起维持DNA完整性的作用。综上所述，这些结果为Al 3+提供了新颖的证据。 通过维持分生细胞中DNA的完整性，对于茶树的根部生长至关重要。
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