Pub Date : 2024-04-01DOI: 10.1016/j.molp.2024.04.007
Victoria Berdion Gabarain, M. A. Ibeas, Hernan Salinas-Grennet, José M. Estevez
{"title":"Auxin signaling gets oxidative to promote root hair growth.","authors":"Victoria Berdion Gabarain, M. A. Ibeas, Hernan Salinas-Grennet, José M. Estevez","doi":"10.1016/j.molp.2024.04.007","DOIUrl":"https://doi.org/10.1016/j.molp.2024.04.007","url":null,"abstract":"","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":null,"pages":null},"PeriodicalIF":27.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140768916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1016/j.molp.2024.04.005
Rafael T. Resende, Lee Hickey, Cibele H. Amaral, Lucas L. Peixoto, G. Marcatti, Yunbi Xu
{"title":"Satellite-enabled Enviromics to Enhance Crop Improvement.","authors":"Rafael T. Resende, Lee Hickey, Cibele H. Amaral, Lucas L. Peixoto, G. Marcatti, Yunbi Xu","doi":"10.1016/j.molp.2024.04.005","DOIUrl":"https://doi.org/10.1016/j.molp.2024.04.005","url":null,"abstract":"","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":null,"pages":null},"PeriodicalIF":27.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140768757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01Epub Date: 2024-03-12DOI: 10.1016/j.molp.2024.03.006
Qingtian Li, Haiyang Yu, Wenwen Chang, Sunhyun Chang, Michael Guzmán, Lionel Faure, Eva-Sophie Wallner, Heqin Yan, Thomas Greb, Lei Wang, Ruifeng Yao, David C Nelson
Hormone-activated proteolysis is a recurring theme of plant hormone signaling mechanisms. In strigolactone signaling, the enzyme receptor DWARF14 (D14) and an F-box protein, MORE AXILLARY GROWTH2 (MAX2), mark SUPPRESSOR OF MAX2 1-LIKE (SMXL) family proteins SMXL6, SMXL7, and SMXL8 for rapid degradation. Removal of these transcriptional corepressors initiates downstream growth responses. The homologous proteins SMXL3, SMXL4, and SMXL5, however, are resistant to MAX2-mediated degradation. We discovered that the smxl4 smxl5 mutant has enhanced responses to strigolactone. SMXL5 attenuates strigolactone signaling by interfering with AtD14-SMXL7 interactions. SMXL5 interacts with AtD14 and SMXL7, providing two possible ways to inhibit SMXL7 degradation. SMXL5 function is partially dependent on an ethylene-responsive-element binding-factor-associated amphiphilic repression (EAR) motif, which typically mediates interactions with the TOPLESS family of transcriptional corepressors. However, we found that loss of the EAR motif reduces SMXL5-SMXL7 interactions and the attenuation of strigolactone signaling by SMXL5. We hypothesize that integration of SMXL5 into heteromeric SMXL complexes reduces the susceptibility of SMXL6/7/8 proteins to strigolactone-activated degradation and that the EAR motif promotes the formation or stability of these complexes. This mechanism may provide a way to spatially or temporally fine-tune strigolactone signaling through the regulation of SMXL5 expression or translation.
{"title":"SMXL5 attenuates strigolactone signaling in Arabidopsis thaliana by inhibiting SMXL7 degradation.","authors":"Qingtian Li, Haiyang Yu, Wenwen Chang, Sunhyun Chang, Michael Guzmán, Lionel Faure, Eva-Sophie Wallner, Heqin Yan, Thomas Greb, Lei Wang, Ruifeng Yao, David C Nelson","doi":"10.1016/j.molp.2024.03.006","DOIUrl":"10.1016/j.molp.2024.03.006","url":null,"abstract":"<p><p>Hormone-activated proteolysis is a recurring theme of plant hormone signaling mechanisms. In strigolactone signaling, the enzyme receptor DWARF14 (D14) and an F-box protein, MORE AXILLARY GROWTH2 (MAX2), mark SUPPRESSOR OF MAX2 1-LIKE (SMXL) family proteins SMXL6, SMXL7, and SMXL8 for rapid degradation. Removal of these transcriptional corepressors initiates downstream growth responses. The homologous proteins SMXL3, SMXL4, and SMXL5, however, are resistant to MAX2-mediated degradation. We discovered that the smxl4 smxl5 mutant has enhanced responses to strigolactone. SMXL5 attenuates strigolactone signaling by interfering with AtD14-SMXL7 interactions. SMXL5 interacts with AtD14 and SMXL7, providing two possible ways to inhibit SMXL7 degradation. SMXL5 function is partially dependent on an ethylene-responsive-element binding-factor-associated amphiphilic repression (EAR) motif, which typically mediates interactions with the TOPLESS family of transcriptional corepressors. However, we found that loss of the EAR motif reduces SMXL5-SMXL7 interactions and the attenuation of strigolactone signaling by SMXL5. We hypothesize that integration of SMXL5 into heteromeric SMXL complexes reduces the susceptibility of SMXL6/7/8 proteins to strigolactone-activated degradation and that the EAR motif promotes the formation or stability of these complexes. This mechanism may provide a way to spatially or temporally fine-tune strigolactone signaling through the regulation of SMXL5 expression or translation.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":null,"pages":null},"PeriodicalIF":27.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140110791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01Epub Date: 2024-02-09DOI: 10.1016/j.molp.2024.02.006
Shaofang Wu, Chaoyi Hu, Changan Zhu, Yanfen Fan, Jie Zhou, Xiaojia Xia, Kai Shi, Yanhong Zhou, Christine H Foyer, Jingquan Yu
Jasmonates (JAs), a class of lipid-derived stress hormones, play a crucial role across an array of plant physiological processes and stress responses. Although JA signaling is thought to rely predominantly on the degradation of specific JAZ proteins by SCFCOI1, it remains unclear whether other pathways are involved in the regulation of JAZ protein stability. Here, we report that PUB22, a plant U-box type E3 ubiquitin ligase, plays a critical role in the regulation of plant resistance against Helicoverpa armigera and other JA responses in tomato. Whereas COI1 physically interacts with JAZ1/2/5/7, PUB22 physically interacts with JAZ1/3/4/6. PUB22 ubiquitinates JAZ4 to promote its degradation via the 26S proteasome pathway. Importantly, we observed that pub22 mutants showreduced resistance to H. armigera, whereas jaz4 single mutants and jaz1 jaz3 jaz4 jaz6 quadruple mutants have enhanced resistance. The hypersensitivity of pub22 mutants to herbivores could be partially rescued by JAZ4 mutation. Moreover, we found that expression of PUB22 can be transcriptionally activated by MYC2, thus forming a positive feedback circuit in JA signaling. We noticed that the PUB22-JAZ4 module also regulates other JA responses, including defense against B. cinerea, inhibition of root elongation, and anthocyanin accumulation. Taken together, these results indicate that PUB22 plays a crucial role in plant growth and defense responses, together with COI1-regulated JA signaling, by targeting specific JAZs.
茉莉酸盐（JA）是一类源于脂质的胁迫激素，在一系列植物生理过程和胁迫反应中发挥着至关重要的作用。虽然人们普遍认为 JA 信号主要依赖 SCFCOI1 对特定 JASMONATE-ZIM DOMAIN (JAZ) 蛋白的降解，但是否有其他途径参与了 JAZ 蛋白稳定性的调控仍不清楚。在这里，我们报告了植物 U-box 型 E3 泛素连接酶 PUB22 在调控番茄对 Helicoverpa armigera 的抗性和其他 JA 反应中的重要作用。COI1 与 JAZ1/2/5/7 有物理作用，而 PUB22 与 JAZ1/3/4/6 有物理作用。PUB22 泛素化 JAZ4，促进其通过 26S 蛋白酶体途径降解。重要的是，pub22 突变体对 H. armigera 的抗性降低，而 jaz4 突变体和 jaz1 jaz3 jaz4 jaz6 四重突变体对 H. armigera 的抗性增强。JAZ4 突变可部分缓解 pub22 突变体对食草动物的过敏性。此外，PUB22的表达被MYC2转录激活，从而在JA信号转导中形成正反馈回路。值得注意的是，PUB22-JAZ4 模块调控各种 JA 反应，包括对灰霉病的防御、根伸长抑制和花青素积累。综上所述，PUB22 通过靶向特定的 JAZ，与 COI1 调控的 JA 信号在植物对环境变化的响应中起着至关重要的作用。
{"title":"The MYC2-PUB22-JAZ4 module plays a crucial role in jasmonate signaling in tomato.","authors":"Shaofang Wu, Chaoyi Hu, Changan Zhu, Yanfen Fan, Jie Zhou, Xiaojia Xia, Kai Shi, Yanhong Zhou, Christine H Foyer, Jingquan Yu","doi":"10.1016/j.molp.2024.02.006","DOIUrl":"10.1016/j.molp.2024.02.006","url":null,"abstract":"<p><p>Jasmonates (JAs), a class of lipid-derived stress hormones, play a crucial role across an array of plant physiological processes and stress responses. Although JA signaling is thought to rely predominantly on the degradation of specific JAZ proteins by SCF<sup>COI1</sup>, it remains unclear whether other pathways are involved in the regulation of JAZ protein stability. Here, we report that PUB22, a plant U-box type E3 ubiquitin ligase, plays a critical role in the regulation of plant resistance against Helicoverpa armigera and other JA responses in tomato. Whereas COI1 physically interacts with JAZ1/2/5/7, PUB22 physically interacts with JAZ1/3/4/6. PUB22 ubiquitinates JAZ4 to promote its degradation via the 26S proteasome pathway. Importantly, we observed that pub22 mutants showreduced resistance to H. armigera, whereas jaz4 single mutants and jaz1 jaz3 jaz4 jaz6 quadruple mutants have enhanced resistance. The hypersensitivity of pub22 mutants to herbivores could be partially rescued by JAZ4 mutation. Moreover, we found that expression of PUB22 can be transcriptionally activated by MYC2, thus forming a positive feedback circuit in JA signaling. We noticed that the PUB22-JAZ4 module also regulates other JA responses, including defense against B. cinerea, inhibition of root elongation, and anthocyanin accumulation. Taken together, these results indicate that PUB22 plays a crucial role in plant growth and defense responses, together with COI1-regulated JA signaling, by targeting specific JAZs.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":null,"pages":null},"PeriodicalIF":27.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139717741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1016/j.molp.2024.04.011
Li‐Qing Chen, L. D. Tiwari
{"title":"Dt1-SWEET10a partner: Photoperiodic control of seed weight in soybean.","authors":"Li‐Qing Chen, L. D. Tiwari","doi":"10.1016/j.molp.2024.04.011","DOIUrl":"https://doi.org/10.1016/j.molp.2024.04.011","url":null,"abstract":"","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":null,"pages":null},"PeriodicalIF":27.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140782595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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