The rose INFLORESCENCE DEFICIENT IN ABSCISSION-LIKE genes, RbIDL1 and RbIDL4, regulate abscission in an ethylene-responsive manner

Singh, Priya; Maurya, Shiv Kumar; Singh, Deepika; Sane, Aniruddha P.

doi:10.1007/s00299-023-03017-6

Cited by 6 publications

(4 citation statements)

References 66 publications

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“…The initiation of floral organ abscission in Arabidopsis involves the binding of the peptide ligand IDA to the functionally redundant receptors HAE and HSL2, forming a core IDA–HAE/HSL2 signaling module that triggers the organ abscission process (Jinn et al, 2000; Cho et al, 2008; Stenvik et al, 2008; Liljegren et al, 2009; Santiago et al, 2016). Subsequently, homologs of IDA or HAE/HSL2 have been identified in other plant species (Tucker and Yang, 2012; Estornell et al, 2015; Stø et al, 2015; Ying et al, 2016; Wilmowicz et al, 2018; Li et al, 2021; Yang et al, 2021; Singh et al, 2023). However, whether the IDA–HAE/HSL2 ligand–receptor pair is conserved in different plant organ abscission processes remains to be determined.…”

Section: Discussionmentioning

confidence: 99%

“…In previous studies, we have demonstrated that the ectopic expression of LcIDL1 and LcHSL2 can reactivate the floral organ abscission process in Arabidopsis ida and hae hsl2 mutant plants (Ying et al, 2016; Wang et al, 2019). Similarly, when IDA homologous genes from citrus ( CitIDA3 ) and rose ( RbIDL1 and RbIDL4 ) are ectopically expressed in Arabidopsis, they induce early flower abscission and rescue the abscission defects in ida mutant plants (Estornell et al, 2015; Singh et al, 2023). These findings suggest that the homologs of the IDA–HAE/HSL2 signaling module are functionally conserved across different plant species.…”

Section: Discussionmentioning

confidence: 99%

“…In Arabidopsis, it has been observed that the abscission deficiency in ida mutants cannot be restored by ethylene treatment, suggesting that the IDA pathway might regulate abscission in an ethylene-independent manner (Jinn et al, 2000;Butenko et al, 2003Butenko et al, , 2006. However, this conclusion has been challenged by several studies indicating that IDA homologous genes from various species, such as tomato, soybean, oil palm, citrus, tea, rose, and yellow lupine, are activated during ethylene-induced abscission, and their expression can be delayed by using inhibitors of ethylene synthesis (Tucker and Yang, 2012;Estornell et al, 2015;Stø et al, 2015;Ying et al, 2016;Wilmowicz et al, 2018;Li et al, 2021;Yang et al, 2021, Singh et al, 2023. Furthermore, ethylene has also been shown to play a role in Arabidopsis cauline leaf abscission induced by water stress and rewatering, a process that requires the IDA-HAE/HSL2 pathway (Meir et al, 2022).…”

Section: Lcidl1 and Lchsl2 Match A Ligand-receptor Pair To Activate L...mentioning

confidence: 99%

“…The IDA–HAE/HSL2 pathway has been identified in several crop species, including tomato, soybean, oil palm, citrus, yellow lupine, tea plant, rose, and litchi. This pathway is involved in ethylene‐induced organ abscission (Tucker and Yang, 2012; Estornell et al, 2015; Stø et al, 2015; Ying et al, 2016; Wilmowicz et al, 2018; Li et al, 2021; Yang et al, 2021; Singh et al, 2023). These findings suggest that the IDA–HAE/HSL2 signaling module is evolutionarily conserved in plants and acts downstream of ethylene during abscission.…”

Section: Introductionmentioning

confidence: 99%

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The transcriptional control of LcIDL1–LcHSL2 complex by LcARF5 integrates auxin and ethylene signaling for litchi fruitlet abscission

Ma,

He,

Yuan

et al. 2024

JIPB

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At the physiological level, the interplay between auxin and ethylene has long been recognized as crucial for the regulation of organ abscission in plants. However, the underlying molecular mechanisms remain unknown. Here, we identified transcription factors involved in indoleacetic acid (IAA) and ethylene (ET) signaling that directly regulate the expression of INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) and its receptor HAESA (HAE), which are key components initiating abscission. Specifically, litchi IDA‐like 1 (LcIDL1) interacts with the receptor HAESA‐like 2 (LcHSL2). Through in vitro and in vivo experiments, we determined that the auxin response factor LcARF5 directly binds and activates both LcIDL1 and LcHSL2. Furthermore, we found that the ETHYLENE INSENSITIVE 3‐like transcription factor LcEIL3 directly binds and activates LcIDL1. The expression of IDA and HSL2 homologs was enhanced in LcARF5 and LcEIL3 transgenic Arabidopsis plants, but reduced in ein3 eil1 mutants. Consistently, the expressions of LcIDL1 and LcHSL2 were significantly decreased in LcARF5‐ and LcEIL3‐silenced fruitlet abscission zones (FAZ), which correlated with a lower rate of fruitlet abscission. Depletion of auxin led to an increase in 1‐aminocyclopropane‐1‐carboxylic acid (the precursor of ethylene) levels in the litchi FAZ, followed by abscission activation. Throughout this process, LcARF5 and LcEIL3 were induced in the FAZ. Collectively, our findings suggest that the molecular interactions between litchi AUXIN RESPONSE FACTOR 5 (LcARF5)–LcIDL1/LcHSL2 and LcEIL3–LcIDL1 signaling modules play a role in regulating fruitlet abscission in litchi and provide a long‐sought mechanistic explanation for how the interplay between auxin and ethylene is translated into the molecular events that initiate abscission.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Lcidl1 and Lchsl2 Match A Ligand-receptor Pair To Activate L...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The transcriptional control of LcIDL1–LcHSL2 complex by LcARF5 integrates auxin and ethylene signaling for litchi fruitlet abscission

Ma,

He,

Yuan

et al. 2024

JIPB

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Mobile Signaling Peptides: Secret Molecular Messengers with a Mighty Role in Plant Life

Pandita¹,

Bhat

Wani

et al. 2023

J Plant Growth Regul

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Adaptive mechanisms for unfavorable environments have evolved in plants for thousands of generations, primarily in the form of endogenous chemical signals and the coordination of physiological processes. Signaling peptides (SPs) are diverse molecular messengers in various stress responses which have been identified in different plant families. SPs are recognized by the membrane-localized receptors and co-receptors, leading to downstream signaling for various plant responses. Progress in in silico analysis, along with other factors, has increased our understanding of the signaling peptide-mediated regulatory mechanisms underlying the entire plant life cycle. SPs mediate both long-distance (root-to-shoot-to-root) and local cell–cell communication via vascular system to communicate and coordinate with plant organs at distant locations. During abiotic stress, SPs inside plant cells perceive stress signals and transfer information at short and long physiological ranges through the signal transduction pathway, causing stress-responsive gene expression. SPs interact with pathogens and mediate cell-to-cell communication via signaling pathways. There are intriguing relationships between phytohormones and the secondary signaling cascades which are mediated by SPs. During biotic or abiotic stress, different peptides trigger jasmonic acid, ethylene, and ABA signaling, involving several secondary messengers. These messengers mediate the stress response via shared signaling components of ROS, Ca2+, and MAPKs, and they modify the gene expression for different phytohormones. In this review, we highlight current knowledge on the role of signaling peptides in plant adaptation, growth, and development. We aim to analyze the SP-receptor interactions and the significance of crosstalk between a few sample SPs and phytohormones. Potential directions on how scientists can use this information for crop improvement are also suggested.

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Abscission in plants: from mechanism to applications

Li,

2024

Adv. Biotechnol.

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Abscission refers to the natural separation of plant structures from their parent plants, regulated by external environmental signals or internal factors such as stress and aging. It is an advantageous process as it enables plants to shed unwanted organs, thereby regulating nutrient allocation and ensuring the dispersal of fruits and seeds from the parent. However, in agriculture and horticulture, abscission can severely reduce crop quality and yield. In this review, we summarize the recent advances in plant abscission from the perspectives of developmental and molecular biology, emphasizing the diverse regulatory networks across different plant lineages, from model plants to crops. The sophisticated process of plant abscission involves several overlapping steps, including the differentiation of the abscission zone, activation of abscission, tissue detachment, and formation of a protective layer. Finally, we discuss the potential applications of physiological modifications and genetic manipulations of plant abscission in sustainable agriculture in the future.

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The rose INFLORESCENCE DEFICIENT IN ABSCISSION-LIKE genes, RbIDL1 and RbIDL4, regulate abscission in an ethylene-responsive manner

Cited by 6 publications

References 66 publications

The transcriptional control of LcIDL1–LcHSL2 complex by LcARF5 integrates auxin and ethylene signaling for litchi fruitlet abscission

The transcriptional control of LcIDL1–LcHSL2 complex by LcARF5 integrates auxin and ethylene signaling for litchi fruitlet abscission

Mobile Signaling Peptides: Secret Molecular Messengers with a Mighty Role in Plant Life

Abscission in plants: from mechanism to applications

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