Evidence for Brassinosteroid-Mediated PAT During Germination of Spathoglottis plicata (Orchidaceae)

Frontiers in Plant Science
Stacey NovakJazmin de León

Abstract

Polar auxin transport (PAT) is facilitated by polar localization of PIN-FORMED (PIN) efflux carriers, which direct auxin flow and regulate developmental events. Brassinosteroids (BRs) and auxin work synergistically to promote growth, and in root geotropisms this cross-talk involves BR-directed polarization of PIN through the mobilization of F-actin. However, the role of BR in PAT during shoot growth, hair formation, and embryogenesis has not been well studied. Orchid seed are mature at a point in development that is analogous to the globular-stage of embryogenesis in typical angiosperms. Thus, this system provided a unique opportunity to study the effects of BR on PAT during embryogenesis-like events, including meristem/first leaf formation and protocorm/stem development, which is followed by protocorm hair formation. In this work, the degree to which BRs rescued embryo-like protocorms from the impact of PAT-disrupting agents, such as PAT inhibitors or high auxin levels, was determined based on growth responses. This study first established that auxin and BRs work together synergistically to promote seedling elongation in Spathoglottis. Repressed seedling growth caused by the PAT-disrupting agents was alleviated with eBL, sugge...Continue Reading

References

Jun 15, 2000·Nature Cell Biology·W M MortonP J McLaughlin
Dec 15, 2000·Plant Physiology·J W Schiefelbein
Feb 28, 2002·Plant & Cell Physiology·Masaki NakayaMasahiro Kato
Apr 3, 2002·Protoplasma·F WallerP Nick
Jul 25, 2003·Plant Cell Reports·G S PullmanB H Phan
Aug 26, 2004·PLoS Biology·Jennifer L NemhauserJoanne Chory
Jul 1, 2005·Nature·Tomasz PaciorekJirí Friml
Aug 4, 2005·Development·Pablo D Jenik, M Kathryn Barton
Apr 26, 2006·Bioscience, Biotechnology, and Biochemistry·Hoyeun KimSang-Gu Kim
Mar 6, 2007·Plant Physiology·Jan Maisch, Peter Nick
Mar 14, 2008·Proceedings of the National Academy of Sciences of the United States of America·Pankaj DhonuksheJirí Friml
Nov 18, 2008·Plant Physiology and Biochemistry : PPB·Andrzej Bajguz, Shamsul Hayat
May 7, 2009·Proceedings of the National Academy of Sciences of the United States of America·Kavitha T KuppusamyJennifer L Nemhauser
Jul 28, 2009·Plant Physiology·Peter NickGyeunhung An
Apr 1, 2008·Plant Signaling & Behavior·Frantisek BaluskaStefano Mancuso
Feb 3, 2011·The Plant Journal : for Cell and Molecular Biology·Yuhee ChungSunghwa Choe
Nov 22, 2011·Plant Physiology·Cristina L Walcher, Jennifer L Nemhauser
Jun 14, 2013·Plant Science : an International Journal of Experimental Plant Biology·Yulia Fridman, Sigal Savaldi-Goldstein
Nov 26, 2013·Frontiers in Plant Science·Richard D-W Lee, Hyung-Taeg Cho
Sep 27, 2014·The Plant Journal : for Cell and Molecular Biology·Puna M MaharjanSunghwa Choe
Dec 9, 2014·Plant Signaling & Behavior·Stacey D NovakRoshan N Gamage
Jan 22, 2015·The Plant Cell·Maciek Adamowski, Jiří Friml
Jun 19, 2015·Journal of Experimental Botany·Jinsheng Zhu, Markus Geisler
Oct 16, 2015·BMC Plant Biology·Thomas BittnerChristiane Fischer-Iglesias
Nov 20, 2015·Frontiers in Plant Science·Shivani SainiPratap Kumar Pati
Jan 21, 2016·Plant Physiology·Silvia Melina VelasquezJosé M Estevez
Aug 6, 2017·Botanical Studies·Edward C Yeung
Jan 13, 2018·Journal of Experimental Botany·Xiaolei LiuXuelu Wang
Feb 7, 2018·Frontiers in Plant Science·Huiyu TianZhaojun Ding

❮ Previous
Next ❯

Methods Mentioned

BETA
GTPases
RNA-seq

Software Mentioned

NIS
Elements D

Related Concepts

Related Feeds

Canavan Disease

Canavan disease, a type of leukodystrophy, is an autosomal recessive neurodegenerative disorder, and is one of the most common degenerative cerebral diseases of infancy. Discover the latest research on Canavan disease here.

Atopic Dermatitis

Atopic dermatitis is a chronic inflammatory genetically determined disease of the skin marked by increased ability to form reagin (IgE), with increased susceptibility to allergic rhinitis and asthma, and hereditary disposition to a lowered threshold for pruritus. Discover the latest research on atopic dermatitis here.