A Small C2-domain Protein from the Resurrection Plant Boea hygrometrica Promotes Plant Responses to Abscisic Acid

2012 ◽  
Vol 47 (1) ◽  
pp. 11-27 ◽  
Author(s):  
Zhang Lanjun ◽  
Ji Feiteng ◽  
Wang Lili ◽  
Qi Dongdong ◽  
Zhu Yan ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Resurrection Plant ◽  
Plant Responses ◽  
C2 Domain ◽  
Domain Protein ◽  
Boea Hygrometrica

Knockout of AtDjB1, a J-domain protein fromArabidopsis thaliana, alters plant responses to osmotic stress and abscisic acid

2014 ◽  
Vol 152 (2) ◽  
pp. 286-300 ◽  
Author(s):  
Xingxing Wang ◽  
Ning Jia ◽  
Chunlan Zhao ◽  
Yulu Fang ◽  
Tingting Lv ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Osmotic Stress ◽  
Plant Responses ◽  
J Domain ◽  
Domain Protein

scholarly journals Brassinosteroids repress the seed maturation program during the seed-to-seedling transition

2021 ◽  
Author(s):  
Jiuxiao Ruan ◽  
Huhui Chen ◽  
Tao Zhu ◽  
Yaoguang Yu ◽  
Yawen Lei ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Abscisic Acid ◽  
Plant Hormone ◽  
Flowering Plants ◽  
Seed Maturation ◽  
Domain Protein ◽  
Abscisic Acid Insensitive3 ◽  
Underlying Mechanisms ◽  
Embryonic Structure

Abstract In flowering plants, repression of the seed maturation program is essential for the transition from the seed to the vegetative phase, but the underlying mechanisms remain poorly understood. The B3-domain protein VIVIPAROUS1/ABSCISIC ACID-INSENSITIVE3-LIKE 1 (VAL1) is involved in repressing the seed maturation program. Here we uncovered a molecular network triggered by the plant hormone brassinosteroid (BR) that inhibits the seed maturation program during the seed-to-seedling transition in Arabidopsis (Arabidopsis thaliana). val1-2 mutant seedlings treated with a BR biosynthesis inhibitor form embryonic structures, whereas BR signaling gain-of-function mutations rescue the embryonic structure trait. Furthermore, the BR-activated transcription factors BRI1-EMS-SUPPRESSOR 1 and BRASSINAZOLE-RESISTANT 1 bind directly to the promoter of AGAMOUS-LIKE15 (AGL15), which encodes a transcription factor involved in activating the seed maturation program, and suppress its expression. Genetic analysis indicated that BR signaling is epistatic to AGL15 and represses the seed maturation program by downregulating AGL15. Finally, we showed that the BR-mediated pathway functions synergistically with the VAL1/2-mediated pathway to ensure the full repression of the seed maturation program. Together, our work uncovered a mechanism underlying the suppression of the seed maturation program, shedding light on how BR promotes seedling growth.

scholarly journals Calcium-Promoted Interaction between the C2-Domain Protein EHB1 and Metal Transporter IRT1 Inhibits Arabidopsis Iron Acquisition

2019 ◽  
Vol 180 (3) ◽  
pp. 1564-1581 ◽  
Author(s):  
Imran Khan ◽  
Regina Gratz ◽  
Polina Denezhkin ◽  
Stephan N. Schott-Verdugo ◽  
Kalina Angrand ◽  
...  
Keyword(s):  
Iron Acquisition ◽  
C2 Domain ◽  
Metal Transporter ◽  
Domain Protein

Molecular cloning and differential expression of sHSP gene family members from the resurrection plant Boea hygrometrica in response to abiotic stresses

Biologia ◽  
2013 ◽  
Vol 68 (4) ◽  
Author(s):  
Zhennan Zhang ◽  
Bo Wang ◽  
Dongmei Sun ◽  
Xin Deng
Keyword(s):  
Molecular Chaperones ◽  
Abiotic Stresses ◽  
Potential Role ◽  
Resurrection Plant ◽  
High Calcium ◽  
Shsp Gene ◽  
Alkaline Conditions ◽  
Boea Hygrometrica ◽  
Shock Proteins

AbstractSmall heat shock proteins (sHSPs) are a class of molecular chaperones that bind to and prevent aggregation of proteins. To assess the potential role of sHSPs in protection against abiotic stresses, we conducted a screening of sHSP genes from the desiccation-tolerant resurrection plant Boea hygrometrica, which is widespread in East Asia in alkaline, calcium-rich limestone crevices. In total, 25 sHSP genes, belonging to six subgroups, were identified from the desiccated leaves of B. hygrometrica. Ten of these genes were cloned and named according to the nomenclature proposed for sHSPs. Transcripts of all these BhsHSPs were detectable in fresh leaves, but only 6 genes were induced after desiccation, and remained high during rehydration. Four of the cytosol-targeted BhsHSP genes were up-regulated under treatments, such as heat, cold, alkaline conditions, high calcium, oxidation, or application of the phytohormone abscisic acid. Together, these results demonstrate that CI and CII sHSPs, especially Bh17.9CI and Bh17.4BCII, are associated with abiotic stresses, and may function in the maintenance of protein stability, aiding in the adaptations to extreme environmental conditions in which B. hygrometrica can survive.

scholarly journals Structural insights into a C2 domain protein specifically found in tardigrades

2020 ◽  
Vol 30 (2) ◽  
pp. 513-518
Author(s):  
Yohta Fukuda ◽  
Tsuyoshi Inoue
Keyword(s):  
C2 Domain ◽  
Domain Protein ◽  
Structural Insights

Changes in abscisic acid content during and after drought are related to carbohydrate mobilization and hydraulic recovery in poplar stems

2020 ◽  
Vol 40 (8) ◽  
pp. 1043-1057 ◽  
Author(s):  
Cecilia Brunetti ◽  
Tadeja Savi ◽  
Andrea Nardini ◽  
Francesco Loreto ◽  
Antonella Gori ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Hydraulic Conductivity ◽  
Stomatal Closure ◽  
Populus Nigra ◽  
Plant Responses ◽  
Stem Water Potential ◽  
Transport Efficiency ◽  
Drought Relief ◽  
Aba Content ◽  
Abscisic Acid Content

Abstract Drought compromises plant's ability to replace transpired water vapor with water absorbed from the soil, leading to extensive xylem dysfunction and causing plant desiccation and death. Short-term plant responses to drought rely on stomatal closure, and on the plant's ability to recover hydraulic functioning after drought relief. We hypothesize a key role for abscisic acid (ABA) not only in the control of stomatal aperture, but also in hydraulic recovery. Young plants of Populus nigra L. were used to investigate possible relationships among ABA, non-structural carbohydrates (NSC) and xylem hydraulic function under drought and after re-watering. In Populus nigra L. plants subjected to drought, water transport efficiency and hydraulic recovery after re-watering were monitored by measuring the percentage loss of hydraulic conductivity (PLC) and stem specific hydraulic conductivity (Kstem). In the same plants ABA and NSC were quantified in wood and bark. Drought severely reduced stomatal conductance (gL) and markedly increased the PLC. Leaf and stem water potential, and stem hydraulic efficiency fully recovered within 24 h after re-watering, but gL values remained low. After re-watering, we found significant correlations between changes in ABA content and hexoses concentration both in wood and bark. Our findings suggest a role for ABA in the regulation of stem carbohydrate metabolism and starch mobilization upon drought relief, possibly promoting the restoration of xylem transport capacity.

scholarly journals Arabidopsis exoribonuclease USB1 interacts with the PPR-domain protein SOAR1 to negatively regulate abscisic acid signaling

2020 ◽  
Vol 71 (19) ◽  
pp. 5837-5851
Author(s):  
Yu Ma ◽  
Shang Zhang ◽  
Chao Bi ◽  
Chao Mei ◽  
Shang-Chuan Jiang ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Regulation Of Gene Expression ◽  
Mrna Splicing ◽  
Plant Responses ◽  
Aba Signaling ◽  
Pentatricopeptide Repeat ◽  
Spliceosome Assembly ◽  
Early Seedling ◽  
Post Transcriptional Regulation ◽  
Early Seedling Development

Abstract Signaling by the phytohormone abscisic acid (ABA) involves pre-mRNA splicing, a key process of post-transcriptional regulation of gene expression. However, the regulatory mechanism of alternative pre-mRNA splicing in ABA signaling remains largely unknown. We previously identified a pentatricopeptide repeat protein SOAR1 (suppressor of the ABAR-overexpressor 1) as a crucial player downstream of ABAR (putative ABA receptor) in ABA signaling. In this study, we identified a SOAR1 interaction partner USB1, which is an exoribonuclease catalyzing U6 production for spliceosome assembly. We reveal that together USB1 and SOAR1 negatively regulate ABA signaling in early seedling development. USB1 and SOAR1 are both required for the splicing of transcripts of numerous genes, including those involved in ABA signaling pathways, suggesting that USB1 and SOAR1 collaborate to regulate ABA signaling by affecting spliceosome assembly. These findings provide important new insights into the mechanistic control of alternative pre-mRNA splicing in the regulation of ABA-mediated plant responses to environmental cues.

Sign in / Sign up

Export Citation Format

Share Document