Abscisic acid mediates a divergence in the drought response of two conifers

Plant Physiology
Timothy J Brodribb, Scott A M McAdam


During water stress, stomatal closure occurs as water tension and levels of abscisic acid (ABA) increase in the leaf, but the interaction between these two drivers of stomatal aperture is poorly understood. We investigate the dynamics of water potential, ABA, and stomatal conductance during the imposition of water stress on two drought-tolerant conifer species with contrasting stomatal behavior. Rapid rehydration of excised shoots was used as a means of differentiating the direct influences of ABA and water potential on stomatal closure. Pinus radiata (Pinaceae) was found to exhibit ABA-driven stomatal closure during water stress, resulting in strongly isohydric regulation of water loss. By contrast, stomatal closure in Callitris rhomboidea (Cupressaceae) was initiated by elevated foliar ABA, but sustained water stress saw a marked decline in ABA levels and a shift to water potential-driven stomatal closure. The transition from ABA to water potential as the primary driver of stomatal aperture allowed C. rhomboidea to rapidly recover gas exchange after water-stressed plants were rewatered, and was associated with a strongly anisohydric regulation of water loss. These two contrasting mechanisms of stomatal regulation function in ...Continue Reading


Feb 4, 2014·Tree Physiology·Elisabetta OddoAndrea Nardini
Nov 28, 2015·Tree Physiology·Heidi C ZimmerPatrick J Baker
Sep 24, 2014·Proceedings of the National Academy of Sciences of the United States of America·Timothy J BrodribbSamuel C V Martins
Jun 5, 2015·Tree Physiology·Timothy J Brodribb, Scott A M McAdam
Jun 4, 2016·Plant, Cell & Environment·Celia M Rodriguez-DominguezAntonio Diaz-Espejo
Aug 18, 2016·Plant, Cell & Environment·Timothy J BrodribbMadeline R Carins Murphy
Jan 4, 2017·Physiologia Plantarum·Hanan El Aou-OuadJosefina Bota
Jan 18, 2017·Journal of Integrative Plant Biology·Frances C SussmilchScott A M McAdam
Nov 28, 2017·Tree Physiology·Hagar FoxRakefet David-Schwartz
Nov 26, 2016·Tree Physiology·N Garcia-FornerJ Martínez-Vilalta
Jul 6, 2014·Plant, Cell & Environment·Scott A M McAdam, Timothy J Brodribb
Sep 1, 2019·Plant, Cell & Environment·Hans AmmitzbollJules S Freeman
Aug 24, 2018·Tree Physiology·Cecilia BrunettiMassimiliano Tattini
Jun 1, 2015·Functional Plant Biology : FPB·Abraham Blum
Feb 12, 2020·Functional Plant Biology : FPB·Jaymee R EncaboIl-Ryong Choi
Apr 1, 2015·Functional Plant Biology : FPB·Uri HochbergShimon Rachmilevitch
Apr 12, 2017·Tree Physiology·Patrick J MitchellTimothy J Brodribb


Jan 15, 2002·Plant Physiology·Hervé CochardThierry Améglio
Aug 17, 2005·The New Phytologist·M Rob G Roelfsema, Rainer Hedrich
Oct 13, 2005·The New Phytologist·Thomas N Buckley
Nov 23, 2006·Plant Physiology·Peter J Franks, Graham D Farquhar
Nov 18, 2008·Plant Physiology·Tim J Brodribb, Hervé Cochard
Jun 16, 2010·Plant, Cell & Environment·Gaëlle DamourLaurent Urban
Dec 18, 2010·Science·Tim J Brodribb, Scott A M McAdam
Apr 21, 2012·The Plant Cell·Scott A M McAdam, Timothy J Brodribb
Feb 21, 2013·The New Phytologist·Scott A M McAdam, Timothy J Brodribb

Related Concepts

Picea excelsa
Plant Stomata
Stomatal Closure
Cardamine bulbosa
Contrast Used
Abscisic Acid

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Sexual Dimorphism in Neurodegeneration

There exist sex differences in neurodevelopmental and neurodegenerative disorders. For instance, multiple sclerosis is more common in women, whereas Parkinson’s disease is more common in men. Here is the latest research on sexual dimorphism in neurodegeneration

HLA Genetic Variation

HLA genetic variation has been found to confer risk for a wide variety of diseases. Identifying these associations and understanding their molecular mechanisms is ongoing and holds promise for the development of therapeutics. Find the latest research on HLA genetic variation here.

Super-resolution Microscopy

Super-resolution microscopy is the term commonly given to fluorescence microscopy techniques with resolutions that are not limited by the diffraction of light. Here are the latest discoveries pertaining to super-resolution microscopy.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells.

Brain Lower Grade Glioma

Low grade gliomas in the brain form from oligodendrocytes and astrocytes and are the slowest-growing glioma in adults. Discover the latest research on these brain tumors here.

CD4/CD8 Signaling

Cluster of differentiation 4 and 8 (CD8 and CD8) are glycoproteins founds on the surface of immune cells. Here is the latest research on their role in cell signaling pathways.

Alignment-free Sequence Analysis Tools

Alignment-free sequence analyses have been applied to problems ranging from whole-genome phylogeny to the classification of protein families, identification of horizontally transferred genes, and detection of recombined sequences. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.