Rice Physiology, Genetics and Breeding

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Crop Physiology and Crop Production".

Deadline for manuscript submissions: 31 May 2026 | Viewed by 704

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Guest Editor
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Interests: rice genomics; rice germplasm resource innovation; salt tolerance; gene function analysis
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Special Issue Information

Dear Colleagues,

Cultivated rice is not only a staple food support for around 4 billion people around the world, but also a module plant for molecular biological studies. With the rapid advancements in sequencing technology, the development of rice physiology, genetics, and breeding has clearly lagged behind the pace of genomic big data. Enhancing research in these areas will better facilitate the application of superior rice varieties and fundamental research in genomic-based plant molecular biology. Especially, the identification of novel genes and the innovation of elite rice germplasm would provide resources for rice breeding and new insights into physiological mechanisms.

In this Special Issue, we aim to exchange knowledge on any aspect related to rice genetics, physiology, and breeding and elite rice germplasm innovation. Especially, in the novel gene function analysis, genetic or physiological mechanisms. 

Dr. Weihua Qiao
Guest Editor

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Published Papers (1 paper)

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Research

14 pages, 4167 KB  
Article
Protein Phosphatase OsPP2C55 Negatively Regulates Abscisic Acid Biosynthesis and Saline–Alkaline Tolerance in Rice
by Gang Zhang, Yi Yang, Yuhan Jing, Mengjiao Xin, Shuxian Shi, Qingshuai Chen, Ke Yao, Mengyu Su, Lijing Wang and Mingyi Jiang
Plants 2025, 14(21), 3362; https://doi.org/10.3390/plants14213362 - 3 Nov 2025
Cited by 1 | Viewed by 582
Abstract
In rice (Oryza sativa L.), the short-chain dehydrogenase protein OsABA2 plays a crucial role in regulating abscisic acid (ABA) biosynthesis. However, little is known about the other proteins that interact with OsABA2 to regulate ABA biosynthesis. Using yeast two-hybrid screening, we identified [...] Read more.
In rice (Oryza sativa L.), the short-chain dehydrogenase protein OsABA2 plays a crucial role in regulating abscisic acid (ABA) biosynthesis. However, little is known about the other proteins that interact with OsABA2 to regulate ABA biosynthesis. Using yeast two-hybrid screening, we identified a novel OsABA2 interacting protein OsPP2C55, which contains a serine/threonine phosphatase (family 2C) catalytic domain. The yeast two-hybrid (Y2H) assay and firefly luciferase complementary imaging (LCI) assay confirmed these interactions. Subsequent studies revealed that saline–alkaline stress significantly downregulated OsPP2C55 gene expression. Meanwhile, we constructed ospp2c55 CRISPR gene knockout (ospp2c55-KO) plants using Agrobacterium genetic transformation. Compared with wild-type plants, ospp2c55-KO plants under saline–alkaline stress exhibited significantly elevated OsABA2 protein levels, leading to substantial increases in ABA content. In addition, ospp2c55-KO plants demonstrated heightened sensitivity to ABA during seed germination. Moreover, ospp2c55-KO plants improved the survival rate and stress-related indices of rice seedlings under saline–alkaline stress, and upregulated the expression of genes related to adversity stress (OsNCED1, OsNCED3, OsABA2, OsSODCc2, and OsCatB). We found that OsPP2C55 plays a negative regulatory role in ABA biosynthesis and saline–alkaline stress tolerance in rice. Full article
(This article belongs to the Special Issue Rice Physiology, Genetics and Breeding)
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