ATHB17 Is a Positive Regulator of Abscisic Acid Response during Early Seedling Growth

Park, Min Young; Kim, Sung-ah; Lee, Sun-ji; Kim, Soo Young

doi:10.1007/s10059-013-2245-5

Cited by 25 publications

(29 citation statements)

References 30 publications

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“…However, at mature stage, ATHB17 was mainly expressed in roots (Fig. 1A-g), in agreement with the results of Park et al 36…”

Section: Resultssupporting

confidence: 92%

“…By examining GFP florescence in root of the transgenic plant, we found that ATHB17 was predominantly localized in the nucleus (Fig. 1E), which is consistent with the previous report36.…”

Section: Resultssupporting

confidence: 91%

“…The ATHB17 OX Arabidopsis plants showed enhanced drought tolerance while the ATHB17 KO plants were drought sensitive compared with WT plants (Supplementary Fig. S5A,B), which is consistent with the result of Park et al 36…”

Section: Resultssupporting

confidence: 91%

“…3). These results partially agree with the results by Park et al 36,. who reported that ATHB17 overexpression did not affect the expression of a number of ABA-responsive genes.…”

Section: Discussionsupporting

confidence: 93%

“…ATHB17 -overexpressing Arabidopsis plants are sensitive to ABA and NaCl, whereas ATHB17 knockout mutants are insensitive to ABA and NaCl at post germination stage. However, these phenotypes are weak and the expression of ABA-responsive genes is not significantly altered in the ATHB17 -overexpressing plants compared with wild-type (WT) plants36. At this stage it remains unclear if the phenotypes result from modulating ABA signaling or other mechanisms.…”

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confidence: 99%

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ATHB17 enhances stress tolerance by coordinating photosynthesis associated nuclear gene and ATSIG5 expression in response to abiotic stress

Zhao

Rong

et al. 2017

Sci Rep

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Photosynthesis is sensitive to environmental stress and must be efficiently modulated in response to abiotic stress. However, the underlying mechanisms are not well understood. Here we report that ARABIDOPSIS THALIANA HOMEOBOX 17 (ATHB17), an Arabidopsis HD-Zip transcription factor, regulated the expression of a number of photosynthesis associated nuclear genes (PhANGs) involved in the light reaction and ATSIG5 in response to abiotic stress. ATHB17 was responsive to ABA and multiple stress treatments. ATHB17-overexpressing plants displayed enhanced stress tolerance, whereas its knockout mutant was more sensitive compared to the wild type. Through RNA-seq and quantitative real-time reverse transcription PCR (qRT-PCR) analysis, we found that ATHB17 did not affect the expression of many known stress-responsive marker genes. Interestingly, we found that ATHB17 down-regulated many PhANGs and could directly modulate the expression of several PhANGs by binding to their promoters. Moreover, we identified ATSIG5, encoding a plastid sigma factor, as one of the target genes of ATHB17. Loss of ATSIG5 reduced salt tolerance while overexpression of ATSIG5 enhanced salt tolerance, similar to that of ATHB17. ATHB17 can positively modulate the expression of many plastid encoded genes (PEGs) through regulation of ATSIG5. Taken together, our results suggest that ATHB17 may play an important role in protecting plants by adjusting expression of PhANGs and PEGs in response to abiotic stresses.

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“…However, at mature stage, ATHB17 was mainly expressed in roots (Fig. 1A-g), in agreement with the results of Park et al 36…”

Section: Resultssupporting

confidence: 92%

“…By examining GFP florescence in root of the transgenic plant, we found that ATHB17 was predominantly localized in the nucleus (Fig. 1E), which is consistent with the previous report36.…”

Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 91%

“…3). These results partially agree with the results by Park et al 36,. who reported that ATHB17 overexpression did not affect the expression of a number of ABA-responsive genes.…”

Section: Discussionsupporting

confidence: 93%

mentioning

confidence: 99%

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ATHB17 enhances stress tolerance by coordinating photosynthesis associated nuclear gene and ATSIG5 expression in response to abiotic stress

Zhao

Rong

et al. 2017

Sci Rep

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Transcription Factors Involved in ABA Signaling

Kim

2014

Abscisic Acid: Metabolism, Transport and Signaling

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Abscisic acid plays an important regulatory role in seed development and adaptive responses to abiotic stresses in vegetative tissues. The major part of the ABA function entails gene expression events. Various genome-wide transcriptome analyses indicate that ABA regulates the largest number of genes among major plant hormones. Promoter analyses of the ABA-regulated genes revealed that cis-elements sharing the PyACGTGGC core sequence are present in many ABA-responsive genes. The element is generally known as ABA response element (ABRE), and a subfamily of basic leucine zipper (bZIP) proteins has been identified that mediate ABA regulation through the ABRE. Other cis-elements and cognate transcription factors (TFs) involved in ABA-dependent transcription have also been identified by traditional approaches. Additionally, numerous TFs have been reported to regulate ABA-responsive gene expression by reverse genetics means. In this article, I will review ABA-dependent transcription, focusing on the Arabidopsis TFs whose in vivo functions have been experimentally demonstrated.

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Application of T-DNA activation tagging to identify glutamate receptor-like genes that enhance drought tolerance in plants

Lü¹,

Wang²,

Liu³

et al. 2014

Plant Cell Rep

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A high-quality rice activation tagging population has been developed and screened for drought-tolerant lines using various water stress assays. One drought-tolerant line activated two rice glutamate receptor-like genes. Transgenic overexpression of the rice glutamate receptor-like genes conferred drought tolerance to rice and Arabidopsis. Rice (Oryza sativa) is a multi-billion dollar crop grown in more than one hundred countries, as well as a useful functional genetic tool for trait discovery. We have developed a population of more than 200,000 activation-tagged rice lines for use in forward genetic screens to identify genes that improve drought tolerance and other traits that improve yield and agronomic productivity. The population has an expected coverage of more than 90 % of rice genes. About 80 % of the lines have a single T-DNA insertion locus and this molecular feature simplifies gene identification. One of the lines identified in our screens, AH01486, exhibits improved drought tolerance. The AH01486 T-DNA locus is located in a region with two glutamate receptor-like genes. Constitutive overexpression of either glutamate receptor-like gene significantly enhances the drought tolerance of rice and Arabidopsis, thus revealing a novel function of this important gene family in plant biology.

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ATHB17 Is a Positive Regulator of Abscisic Acid Response during Early Seedling Growth

Cited by 25 publications

References 30 publications

ATHB17 enhances stress tolerance by coordinating photosynthesis associated nuclear gene and ATSIG5 expression in response to abiotic stress

ATHB17 enhances stress tolerance by coordinating photosynthesis associated nuclear gene and ATSIG5 expression in response to abiotic stress

Transcription Factors Involved in ABA Signaling

Application of T-DNA activation tagging to identify glutamate receptor-like genes that enhance drought tolerance in plants

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