scholarly journals An essential role for abscisic acid in the regulation of xylem fibre differentiation

Development ◽  
2018 ◽  
Vol 145 (21) ◽  
pp. dev161992 ◽  
Author(s):  
Liam Campbell ◽  
J. Peter Etchells ◽  
Matthew Cooper ◽  
Manoj Kumar ◽  
Simon R. Turner
Keyword(s):  
Abscisic Acid ◽  
Essential Role ◽  
Xylem Fibre

scholarly journals Salt Stress Promotes Abscisic Acid Accumulation to Affect Cell Proliferation and Expansion of Primary Roots in Rice

2021 ◽  
Vol 22 (19) ◽  
pp. 10892
Author(s):  
Yingying Huang ◽  
Jiahao Zhou ◽  
Yuxiang Li ◽  
Ruidang Quan ◽  
Juan Wang ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Abscisic Acid ◽  
Salt Stress ◽  
Root Growth ◽  
Essential Role ◽  
Primary Root ◽  
Microscopic Analysis ◽  
Root Apical Meristem ◽  
Aba Signaling ◽  
Rice Varieties

The primary root is the basic component of the root system and plays a key role in early seedling growth in rice. Its growth is easily affected by environmental cues, such as salt stress. Abscisic acid (ABA) plays an essential role in root development, but the molecular mechanism underlying ABA-regulated root growth in response to salt stress remains poorly understood. In this study, we report that salt stress inhibits primary root elongation and promotes primary root swelling. Moreover, salt stress induces the expression of ABA-responsive genes and ABA accumulation in the primary root, revealing that ABA plays an essential role in salt-modulated root growth. Transgenic lines of OsSAPK10-OE and OsABIL2-OE, which constitutively express OsSAPK10 or OsABIL2, with enhanced or attenuated ABA signaling, show increased and decreased sensitivity to salt, correspondingly. Microscopic analysis indicates that salt and ABA inhibits cell proliferation and promotes cell expansion in the root apical meristem. Transcriptome analysis showed that ABA induces the expression of EXPANSIN genes. Further investigations indicate that ABA exerts these effects largely through ABA signaling. Thus, our findings deepen our understanding of the role of ABA in controlling primary root growth in response to salt stress, and this knowledge can be used by breeders to cultivate rice varieties suitable for saline–alkali land.

scholarly journals cis-12-Oxo-phytodienoic acid represses Arabidopsis seed germination in shade conditions

2019 ◽  
Vol 70 (20) ◽  
pp. 5919-5927 ◽  
Author(s):  
Thiago Barros-Galvão ◽  
Anuja Dave ◽  
Adama Cole ◽  
David Harvey ◽  
Swen Langer ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Jasmonic Acid ◽  
Essential Role ◽  
Combined Effect ◽  
Negative Regulator ◽  
Significant Extent ◽  
Arabidopsis Seed ◽  
Seed Age

Abstract Light-dependent seed germination is induced by gibberellins (GA) and inhibited by abscisic acid (ABA). The widely accepted view of the GA/ABA ratio controlling germination does not, however, explain the fact that seeds deficient in ABA still germinate poorly under shade conditions that repress germination. In Arabidopsis, MOTHER-OF-FT-AND-TFL1 (MFT) acts as a key negative regulator of germination, modulating GA and ABA responses under shade conditions. Under full light the oxylipin cis-12-oxo-phytodienoic acid (OPDA), a precursor of the stress-related phytohormone jasmonic acid, interacts with ABA and MFT to repress germination. Here, we show that under shade conditions both OPDA and ABA repress germination to varying extents. We demonstrate that the level of shade-induced MFT expression influences the ability of OPDA and/or ABA to fully repress germination. We also found that MFT expression decreases with seed age and this again correlates with the response of seeds to OPDA and ABA. We conclude that OPDA plays an essential role alongside ABA in repressing germination in response to shade and the combined effect of these phytohormones is integrated to a significant extent through MFT.

OsPP2C09, a negative regulatory factor in abscisic acid signalling, plays an essential role in balancing plant growth and drought tolerance in rice

2020 ◽  
Vol 227 (5) ◽  
pp. 1417-1433 ◽  
Author(s):  
Jun Miao ◽  
Xianfeng Li ◽  
Xiangbo Li ◽  
Wenchen Tan ◽  
Aiqing You ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Tolerance ◽  
Plant Growth ◽  
Essential Role ◽  
Regulatory Factor ◽  
Negative Regulatory Factor

Faint Hα Emission in the Corona and Its Relation to the Prominences

1994 ◽  
Vol 144 ◽  
pp. 339-342
Author(s):  
V. N. Dermendjiev ◽  
Z. Mouradian ◽  
J.- L. Leroy ◽  
P. Duchlev
Keyword(s):  
Magnetic Field ◽  
Solar Corona ◽  
Essential Role ◽  
Hα Emission

AbstractThe relation between episodically observed in the solar corona faint Hαemission structures and the long lived prominences was studied. Particular consideration was given for cases in which the corresponding prominences had undergone DB process. An MHD interpretation of the phenomenon “emissions froides” (cool emission) is proposed in which an essential role plays the prominence supporting magnetic field.

Freeze-fracture observations on changes in the distribution of Filipin-sterol complexes during epididymal maturation and capacitation of boar spermatozoa

1990 ◽  
Vol 48 (3) ◽  
pp. 90-91
Author(s):  
N. Seki ◽  
Y. Toyama ◽  
T. Nagano
Keyword(s):  
Plasma Membrane ◽  
Essential Role ◽  
Freeze Fracture ◽  
Final Concentration ◽  
Freeze Fracturing ◽  
Physiological Conditions ◽  
Epididymal Maturation ◽  
Cacodylate Buffer ◽  
Sperm Membrane ◽  
Boar Spermatozoa

It is believed that i ntramembra.nous sterols play an essential role in membrane stability and permeability. To investigate the distribution changes of sterols in sperm membrane during epididymal maturation and capacitation, filipin has been used as a cytochemical probe for the detection for membrane sterols. Using this technique in combination with freeze fracturing, we examined the boar spermatozoa under various physiological conditions.The spermatozoa were collected from: 1) caput, corpus and cauda epididymides, 2) sperm rich fraction of ejaculates, and 3)the uterus 2hr after natural coition. They were fixed with 2.5% glutaraldehyde in 0.05M cacodylate buffer (pH 7.4), and treated with the filipin solution (final concentration : 0.02.0.05%) for 24hr at 4°C with constant agitation. After the filipin treatment, replicas were made by conventional freeze-fracture technique. The density of filipin-sterol complexes (FSCs) was determined in the E face of the plasma membrane of head regions.

An essential role for N-WASP, but not Cdc42, in EPEC induced pedestal formation

2001 ◽  
Vol 120 (5) ◽  
pp. A126-A126
Author(s):  
F TAKESHIMA ◽  
T SHIBATA ◽  
F CHEN ◽  
C LIU ◽  
D NGUYEN ◽  
...  
Keyword(s):  
Essential Role ◽  
Pedestal Formation

Median sternotomy for an unexpected complication of permanent hemodialysis catheters: "stuck catheter"

VASA ◽  
2008 ◽  
Vol 37 (3) ◽  
pp. 293-296 ◽  
Author(s):  
Akgun ◽  
Ak ◽  
Tugrular ◽  
Civelek ◽  
Isbir ◽  
...  
Keyword(s):  
Essential Role ◽  
Median Sternotomy ◽  
Venous Access

Cuffed tunneled venous access catheters are commonly used for temporary and permanent access in patients undergoing hemodialysis. These catheters play an essential role in providing permanent access in patients in whom all other access options have been exhausted. However, they are prone to several complications like catheter thrombosis, catheter fibrin sheating and infection. Herein, we report two uncommon cases of stuck hemodialysis cuffed tunneled catheters causing stenosis and thrombosis in central veins which needed to be removed by median sternotomy.

Differential accumulation of methyl jasmonate-induced mRNAs in response to abscisic acid and desiccation in barley (Hordeum vulgare)

1992 ◽  
Vol 86 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Steffen Reinbothe ◽  
Christiane Reinbothe ◽  
Jorg Lehmann ◽  
Benno Parthier
Keyword(s):  
Abscisic Acid ◽  
Hordeum Vulgare ◽  
Methyl Jasmonate
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