Discovery of an extended bundle sheath in<Emphasis Type="Italic"> Ricinus communis</Emphasis> L. and its role as a temporal storage compartment for the iron chelator nicotianamine |
| |
Authors: | Email author" target="_blank">T?RuttenEmail author C?Krüger M?Melzer U?W?Stephan R?Hell |
| |
Institution: | Institute of Plant Genetics and Crop Plant Research, Corrensstrasse 3, 06466 Gatersleben, Germany. rutten@ipk-gatersleben.de |
| |
Abstract: | The extended bundle sheath (EBS) is a specialized layer of cells that enhances the lateral transport of photoassimilates within the leaf. This little-known tissue is often considered to be legume-specific. We identified an EBS in cotyledons and leaves of the non-legume Ricinus communis L. By means of cytological and immunological studies and using the localization of the iron-chelator nicotianamine as an established indicator for mass transport, we confirmed its role as a transport tissue and a temporal sink. Observations on cotyledons of Ricinus seedlings further proved that the EBS carries out these tasks from a very early stage of development onwards. This is the first time that information has been obtained on the physiological role of an EBS in a non-legume. Our results support the idea of its widespread occurrence among higher plants. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |