<P><B>ABSTRACT</B></P><P>An <I>Arabidopsis</I> small GTPase, RabG3b, was previously characterized as a component of autophagy and as a positive regulator for xylem development in <I>Arabidopsis</I>...
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https://www.riss.kr/link?id=A107749987
KWON, SOON IL ; CHO, HONG JOO ; LEE, JAE‐ ; SOON ; JIN, HYUNJUNG ; SHIN, SOO‐ ; JEONG ; KWON, MI ; NOH, EUN WOON ; PARK, OHKMAE K.
2011
-
SCOPUS,SCIE
학술저널
2212-2224(13쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>ABSTRACT</B></P><P>An <I>Arabidopsis</I> small GTPase, RabG3b, was previously characterized as a component of autophagy and as a positive regulator for xylem development in <I>Arabidopsis</I>...
<P><B>ABSTRACT</B></P><P>An <I>Arabidopsis</I> small GTPase, RabG3b, was previously characterized as a component of autophagy and as a positive regulator for xylem development in <I>Arabidopsis</I>. In this work, we assessed whether RabG3b modulates xylem‐associated traits in poplar in a similar way as in <I>Arabidopsis</I>. We generated transgenic poplars (<I>Populus alba</I> × <I>Populus tremula</I> var. <I>glandulosa</I>) overexpressing a constitutively active form of <I>RabG3b</I> (RabG3bCA) and performed a range of morphological, histochemical and molecular analyses to examine xylogenesis. RabG3bCA transgenic poplars showed increased stem growth due to enhanced xylem development. Autophagic structures were observed in differentiating xyelm cells undergoing programmed cell death (PCD) in wild‐type poplar, and were more abundant in RabG3bCA transgenic poplar plants and cultured cells. Xylogenic activation was also accompanied by the expression of secondary wall‐, PCD‐ and autophagy‐related genes. Collectively, our results suggest that <I>Arabidopsis</I> RabG3b functions to regulate xylem growth through the activation of autophagy during wood formation in <I>Populus</I>, as does the same in <I>Arabidopsis</I>.</P>
Active ROP2 GTPase inhibits ABA‐ and CO2‐induced stomatal closure