Analysis of the impact of indole-3-acetic acid (IAA) on gene expression during leaf senescence in Arabidopsis thaliana

Gören-Sağlam, Nihal; Harrison, Elizabeth; Breeze, Emily; Öz, Gül; Buchanan‐Wollaston, Vicky

doi:10.1007/s12298-019-00752-7

Cited by 13 publications

(8 citation statements)

References 61 publications

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“…IAA was reported to delay leaf senescence [ 15 ], and the differentially expressed genes from transcriptomic data of leaf senescence induced by darkness also proved evidence that IAA was involved in the regulation of senescence [ 52 ]. Elevated auxin levels caused by overexpression of key auxin synthesis genes, such as YUCC6, or application of exogenous IAA obviously delayed leaf senescence [ 53 , 54 ]. Furthermore, the change in the transcriptional level of IAA signaling transcription factors, such as AUXIN RESPONSE FACTOR 2 (ARF2) and AUXIN RESISTANT 3 (AXR3)/INDOLE-3-ACETIC ACID INDUCIBLE 17 (IAA17), also affected leaf senescence [ 19 , 55 ].…”

Section: Discussionmentioning

confidence: 99%

Melatonin Positively Regulates Both Dark- and Age-Induced Leaf Senescence by Reducing ROS Accumulation and Modulating Abscisic Acid and Auxin Biosynthesis in Cucumber Plants

Jing

Liu

Wang

et al. 2022

IJMS

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Melatonin (MT), as a signaling molecule, plays a vital role in regulating leaf senescence in plants. This study aimed to verify the antioxidant roles of MT in delaying dark- or age-induced leaf senescence of cucumber plants. The results showed that endogenous MT responds to darkness and overexpression of CsASMT, the key gene of MT synthesis, and delays leaf senescence stimulated by darkness, as manifested by significantly lower malonaldehyde (MDA) and reactive oxygen species (ROS) contents as well as higher activities and gene expression of antioxidant enzymes compared to the control. Moreover, MT suppressed both age- or dark-induced leaf senescence of cucumber, as evidenced by a decrease in senescence-related gene SAG20 and cell-death-related gene PDCD expression and ROS content and an increase in antioxidant capacity and chlorophyll biosynthesis compared with the H2O-treated seedlings. Meanwhile, the suppression of age-induced leaf senescence by melatonin was also reflected by the reduction in abscisic acid (ABA) biosynthesis and signaling pathways as well as the promotion of auxin (IAA) biosynthesis and signaling pathways in cucumber plants in the solar greenhouse. Combining the results of the two separate experiments, we demonstrated that MT acts as a powerful antioxidant to alleviate leaf senescence by activating the antioxidant system and IAA synthesis and signaling while inhibiting ABA synthesis and signaling in cucumber plants.

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Section: Discussionmentioning

confidence: 99%

Melatonin Positively Regulates Both Dark- and Age-Induced Leaf Senescence by Reducing ROS Accumulation and Modulating Abscisic Acid and Auxin Biosynthesis in Cucumber Plants

Jing

Liu

Wang

et al. 2022

IJMS

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“…For example, this study predicted the presence of bacterial genes involved in siderophore synthesis that indirectly induce plant systemic resistance by enabling bacteria to compete with pathogens through the removal of iron from the environment (Bakker et al, 2007 ). Moreover, genes involved in the production of phytohormones, such as auxin, indole‐3‐acetic acid (IAA), and 1‐aminocyclopropane‐1‐carboxylic acid (ACC) that directly promote plant growth by enhancing cell division and differentiation or by lowering indigenous ethylene levels in the rhizosphere environment were predicted (Goren‐Saglam et al, 2020 ; Hayat et al, 2010 ; Van de Poel & Van Der Straeten, 2014 ). Additionally, IAA and ACC enable the host plants to adapt to abiotic environmental stress conditions (Ikram et al, 2018 ; Van de Poel & Van Der Straeten, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Deciphering Trifolium pratense L. holobiont reveals a microbiome resilient to future climate changes

Wahdan

Tanunchai

et al. 2021

MicrobiologyOpen

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The plant microbiome supports plant growth, fitness, and resistance against climate change. Trifolium pratense (red clover), an important forage legume crop, positively contributes to ecosystem sustainability. However, T . pratense is known to have limited adaptive ability toward climate change. Here, the T . pratense microbiomes (including both bacteria and fungi) of the rhizosphere and the root, shoot, and flower endospheres were comparatively examined using metabarcoding in a field located in Central Germany that mimics the climate conditions projected for the next 50–70 years in comparison with the current climate conditions. Additionally, the ecological functions and metabolic genes of the microbial communities colonizing each plant compartment were predicted using FUNGuild, FAPROTAX, and Tax4Fun annotation tools. Our results showed that the individual plant compartments were colonized by specific microbes. The bacterial and fungal community compositions of the belowground plant compartments did not vary under future climate conditions. However, future climate conditions slightly altered the relative abundances of specific fungal classes of the aboveground compartments. We predicted several microbial functional genes of the T . pratense microbiome involved in plant growth processes, such as biofertilization (nitrogen fixation, phosphorus solubilization, and siderophore biosynthesis) and biostimulation (phytohormone and auxin production). Our findings indicated that T . pratense microbiomes show a degree of resilience to future climate changes. Additionally, microbes inhabiting T . pratense may not only contribute to plant growth promotion but also to ecosystem sustainability.

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“…A recent study on the effect of IAA on gene expression during leaf senescence reported that IAA treatment accelerated the progression of senescence-related changes, and furthermore, it revealed that the earlier treatment time, i.e. 27 DAS (a few days after sowing), resulted in the most significant acceleration of late leaf senescence compared to 35 DAS (Goren-Saglam et al, 2020 ). Further microarray analysis of gene expression of IAA treatment at different time points showed that the effect of IAA on leaf senescence was not only time-dependent but also interacted with ethylene and JA pathways.…”

Section: Plant Hormones That Delay Leaf Senescencementioning

confidence: 99%

New Advances in the Regulation of Leaf Senescence by Classical and Peptide Hormones

Huang

Guo

2022

Front. Plant Sci.

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Leaf senescence is the last stage of leaf development, manifested by leaf yellowing due to the loss of chlorophyll, along with the degradation of macromolecules and facilitates nutrient translocation from the sink to the source tissues, which is essential for the plants' fitness. Leaf senescence is controlled by a sophisticated genetic network that has been revealed through the study of the molecular mechanisms of hundreds of senescence-associated genes (SAGs), which are involved in multiple layers of regulation. Leaf senescence is primarily regulated by plant age, but also influenced by a variety of factors, including phytohormones and environmental stimuli. Phytohormones, as important signaling molecules in plant, contribute to the onset and progression of leaf senescence. Recently, peptide hormones have been reported to be involved in the regulation of leaf senescence, enriching the significance of signaling molecules in controlling leaf senescence. This review summarizes recent advances in the regulation of leaf senescence by classical and peptide hormones, aiming to better understand the coordinated network of different pathways during leaf senescence.

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Analysis of the impact of indole-3-acetic acid (IAA) on gene expression during leaf senescence in Arabidopsis thaliana

Cited by 13 publications

References 61 publications

Melatonin Positively Regulates Both Dark- and Age-Induced Leaf Senescence by Reducing ROS Accumulation and Modulating Abscisic Acid and Auxin Biosynthesis in Cucumber Plants

Melatonin Positively Regulates Both Dark- and Age-Induced Leaf Senescence by Reducing ROS Accumulation and Modulating Abscisic Acid and Auxin Biosynthesis in Cucumber Plants

Deciphering Trifolium pratense L. holobiont reveals a microbiome resilient to future climate changes

New Advances in the Regulation of Leaf Senescence by Classical and Peptide Hormones

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