{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T13:06:36Z","timestamp":1779368796421,"version":"3.53.0"},"reference-count":65,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T00:00:00Z","timestamp":1764201600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Area Research and Development Program of Xinjiang Production and Construction Corps","award":["2021AB016"],"award-info":[{"award-number":["2021AB016"]}]},{"name":"Major Science and Technology Project of the Autonomous Region","award":["2024A02006"],"award-info":[{"award-number":["2024A02006"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Plants"],"abstract":"<jats:p>Boron exerts regulatory control over various aspects of plant growth and morphogenesis, and the application of boron prior to anthesis has been recognized as a critical agronomic practice. However, the regulatory mechanisms by which boron influences fruit set and early ovary development in pear remain to be elucidated. In this study, boron application was used at three stages, including pre-flowering, full-flowering, and early fruiting in the \u2018Kuerle Xiangli\u2019 (Pyrus sinkiangensis Yu), with a focus on cell expansion and endogenous phytohormone. As a result, treatment with 0.3% boric acid significantly increased endogenous boron concentrations in both leaves and ovaries and enhanced ovary fresh weight as well as both longitudinal and transverse diameters. Histological analysis revealed pronounced cell expansion at 5, 10, and 15 days after pollination (DAP) following boron treatment. Furthermore, gibberellin and trans-zeatin concentrations at 5 and 10 DAP were significantly elevated, while the concentrations of abscisic acid and auxin were markedly reduced. Quantitative real-time PCR (qRT-PCR) analysis demonstrated that boron positively regulates the expression of auxin-related genes, like PbARFH, PbARFD and PbSAUR76-like. In the gibberellin signaling pathway, the expression PbGID1, PbGID1C-like and PbGID2 was activated to drive cell expansion with the boron application. In the abscisic acid signaling pathway, boron treatment induced downregulation of PbSRK2.4, PbABF2, and PbABF2-like in the ovary. Furthermore, boron treatment induced high expression of hormone signaling genes in cytokinin, brassinolide, jasmonic acid and salicylic acid signaling pathways. These findings provide insights into the mechanisms of cell expansion and hormonal changes by which boron modulates early ovary development, offering a basis for improving fruit quality through optimized boron application.<\/jats:p>","DOI":"10.3390\/plants14233619","type":"journal-article","created":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T16:31:52Z","timestamp":1764261112000},"page":"3619","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Comprehensive Analysis of Boron-Induced Changes in Cell Expansion and Phytohormone During Early Ovary Development in Pear (Pyrus sinkiangensis Yu)"],"prefix":"10.3390","volume":"14","author":[{"given":"Jiuhong","family":"Chen","sequence":"first","affiliation":[{"name":"College of Agriculture, Shihezi University, Shihezi 832003, China"},{"name":"The Key Laboratory of Cultivation Physiology and Germplasm Resources Utilization of Special Fruits and Vegetables, Xinjiang Production and Construction Group, Shihezi University, Shihezi 832003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongfeng","family":"Li","sequence":"additional","affiliation":[{"name":"Agricultural Scientific Institute of 2nd Division of Xinjiang Production and Construction Corps, Tiemenguan 841005, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2021-4172","authenticated-orcid":false,"given":"Jie","family":"Wei","sequence":"additional","affiliation":[{"name":"Agricultural Scientific Institute of 2nd Division of Xinjiang Production and Construction Corps, Tiemenguan 841005, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyun","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Agriculture, Shihezi University, Shihezi 832003, China"},{"name":"The Key Laboratory of Cultivation Physiology and Germplasm Resources Utilization of Special Fruits and Vegetables, Xinjiang Production and Construction Group, Shihezi University, Shihezi 832003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhihua","family":"Guo","sequence":"additional","affiliation":[{"name":"College of Agriculture, Shihezi University, Shihezi 832003, China"},{"name":"The Key Laboratory of Cultivation Physiology and Germplasm Resources Utilization of Special Fruits and Vegetables, Xinjiang Production and Construction Group, Shihezi University, Shihezi 832003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyan","family":"Lu","sequence":"additional","affiliation":[{"name":"College of Agriculture, Shihezi University, Shihezi 832003, China"},{"name":"The Key Laboratory of Cultivation Physiology and Germplasm Resources Utilization of Special Fruits and Vegetables, Xinjiang Production and Construction Group, Shihezi University, Shihezi 832003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"e2743","DOI":"10.1002\/eap.2743","article-title":"Addressing pollination deficits in orchard crops through habitat management for wild pollinators","volume":"33","author":"Garratt","year":"2023","journal-title":"Ecol. 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