Intersection of transfer cells with phloem biology-broad evolutionary trends, function, and induction.
Intersection of transfer cells with phloem biology-broad evolutionary trends, function, and induction.
复制标题
DOI：
10.3389/fpls.2013.00221
复制
发表时间：
2013
影响因子：
5.6
通讯作者：
Offler CE
中科院分区：
文献类型：
--
作者：
Andriunas FA;Zhang HM;Xia X;Patrick JW;Offler CE
转移细胞（TC）在整个植物界中无处不在。它们独特的向内生长壁迷宫支持富含转运蛋白的质膜，为这些细胞提供了增强的资源膜转运能力。在某些植物物种中，TC 已被证明具有促进韧皮部在共质/质外质区室之间激烈资源交换的细胞位点加载和/或卸载的功能。在韧皮部内，TC 的关键细胞位置是收集韧皮部的叶小脉和运输韧皮部的茎节。在这些位置，伴生细胞和韧皮部薄壁细胞转分化为 TC 形态，分别促进资源的装载和重新分配。在物种水平上，运输中的 TC 发生率明显高于韧皮部收集中的发生率。 TC 不存在于释放韧皮部中，但出现在筛后元件卸载途径中，特别是在发育中的被子植物种子各代之间的界面处。种子 TC 的实验可及性为研究其诱导信号、向内生长壁形成的调节和膜运输功能提供了机会。本综述使用该信息库来探索韧皮部运输功能和韧皮部相关 TC 的诱导信号传导的当前知识。收集韧皮部和种子 TC 的功能作用得到了明确证据的支持，但对于茎节 TC 却没有这样的信息，这几乎是一项棘手的实验挑战。人们对负责在发育种子中启动转分化为 TC 形态的诱导信号和信号通路有了新的认识。然而，关于诱导种子 TC 的诱导信号（生长素、乙烯和活性氧）在调节韧皮部相关 TC 的诱导中的潜在作用，目前还没有足够的信息来评论。生物韧皮部入侵者已被用作推测这些信号参与的模型。
Transfer cells (TCs) are ubiquitous throughout the plant kingdom. Their unique ingrowth wall labyrinths, supporting a plasma membrane enriched in transporter proteins, provides these cells with an enhanced membrane transport capacity for resources. In certain plant species, TCs have been shown to function to facilitate phloem loading and/or unloading at cellular sites of intense resource exchange between symplasmic/apoplasmic compartments. Within the phloem, the key cellular locations of TCs are leaf minor veins of collection phloem and stem nodes of transport phloem. In these locations, companion and phloem parenchyma cells trans-differentiate to a TC morphology consistent with facilitating loading and re-distribution of resources, respectively. At a species level, occurrence of TCs is significantly higher in transport than in collection phloem. TCs are absent from release phloem, but occur within post-sieve element unloading pathways and particularly at interfaces between generations of developing Angiosperm seeds. Experimental accessibility of seed TCs has provided opportunities to investigate their inductive signaling, regulation of ingrowth wall formation and membrane transport function. This review uses this information base to explore current knowledge of phloem transport function and inductive signaling for phloem-associated TCs. The functional role of collection phloem and seed TCs is supported by definitive evidence, but no such information is available for stem node TCs that present an almost intractable experimental challenge. There is an emerging understanding of inductive signals and signaling pathways responsible for initiating trans-differentiation to a TC morphology in developing seeds. However, scant information is available to comment on a potential role for inductive signals (auxin, ethylene and reactive oxygen species) that induce seed TCs, in regulating induction of phloem-associated TCs. Biotic phloem invaders have been used as a model to speculate on involvement of these signals.
登录
查看更多内容
影响因子：
4.8
作者：
Bienert, Gerd P.;Moller, Anders L. B.;Jahn, Thomas P.
通讯作者：
Jahn, Thomas P.
影响因子：
7.4
作者：
BOUCHEPILLON, S;FLEURATLESSARD, P;BONNEMAIN, JL
通讯作者：
BONNEMAIN, JL
影响因子：
7.2
作者：
Barcala, Marta;Garcia, Alejandra;Escobar, Carolina
通讯作者：
Escobar, Carolina
影响因子：
7.2
作者：
Borisjuk, L;Walenta, S;Wobus, U
通讯作者：
Wobus, U
影响因子：
1.1
作者：
BUSBY, CH;OBRIEN, TP
通讯作者：
OBRIEN, TP