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在天蓝遏蓝菜中，互惠嫁接分离了根和芽在锌超积累中的作用。

Reciprocal grafting separates the roles of the root and shoot in zinc hyperaccumulation in Thlaspi caerulescens.

出版信息

New Phytol. 2009 Oct;184(2):323-329. doi: 10.1111/j.1469-8137.2009.02969.x. Epub 2009 Jul 27.

DOI:10.1111/j.1469-8137.2009.02969.x
PMID:19656301
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2784906/
Abstract
  • The extreme phenotype of zinc (Zn) hyperaccumulation, which is found in several Brassicaceae species, is determined by mechanisms that promote elevated Zn tolerance and high Zn accumulation in shoots. * We used reciprocal grafting between a Zn hyperaccumulator, Thlaspi caerulescens, and a Zn nonaccumulator, Thlaspi perfoliatum, to determine the relative importance of roots and shoots in Zn hyperaccumulation and hypertolerance. * Leaves from plants with a T. perfoliatum rootstock and a T. caerulescens shoot scion did not hyperaccumulate Zn, whereas plants with a T. caerulescens rootstock and a T. perfoliatum shoot scion did hyperaccumulate Zn. However, although leaves from plants with a T. caerulescens rootstock and a T. perfoliatum shoot scion hyperaccumulated Zn, at high Zn loads these leaves showed significant symptoms of Zn toxicity, unlike leaves of self grafted T. caerulescens. * Hyperaccumulation of Zn in leaves of the hyperaccumulator T. caerulescens is pri-marily dictated by root processes. Further, the mechanisms controlling Zn hypertolerance in the hyperaccumulator T. caerulescens are driven primarily by shoot processes.
摘要

锌（Zn）超积累的极端表型存在于几种十字花科物种中，是由促进地上部锌耐受性提高和锌积累的机制决定的。我们利用 Zn 超积累植物天蓝遏蓝菜和 Zn 非积累植物遏蓝菜之间的相互嫁接，来确定根和地上部在 Zn 超积累和高耐 Zn 中的相对重要性。具有天蓝遏蓝菜根砧木和天蓝遏蓝菜接穗的植株的叶片没有超积累 Zn，而具有天蓝遏蓝菜根砧木和遏蓝菜接穗的植株则超积累 Zn。然而，尽管具有天蓝遏蓝菜根砧木和遏蓝菜接穗的植株叶片超积累 Zn，但在高 Zn 负荷下，这些叶片表现出明显的 Zn 毒性症状，与自接穗天蓝遏蓝菜的叶片不同。超积累植物天蓝遏蓝菜叶片中 Zn 的超积累主要由根的过程决定。此外，超积累植物天蓝遏蓝菜中 Zn 高耐受力的控制机制主要由地上部的过程驱动。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/644c26465683/nph0184-0323-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/02e32fd290ff/nph0184-0323-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/d1afdda5aa0f/nph0184-0323-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/b5d8a8be2669/nph0184-0323-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/644c26465683/nph0184-0323-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/02e32fd290ff/nph0184-0323-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/d1afdda5aa0f/nph0184-0323-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/b5d8a8be2669/nph0184-0323-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8841/2784906/644c26465683/nph0184-0323-f4.jpg

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