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Recent advances are revealing mechanisms mediating CO-regulated stomatal movements in Arabidopsis, stomatal architecture and stomatal movements in grasses, and the long-term impact of CO on growth.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8644143 | PMC |
http://dx.doi.org/10.1093/plphys/kiab342 | DOI Listing |
Plant Cell Rep
September 2025
Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy.
Genome doubling did not enhance drought tolerance in alfalfa, but may set the stage for long-term adaptation to drought through a novel transcriptional landscape. Whole genome duplication (WGD) has been shown to enhance stress tolerance in plants. Cultivated alfalfa is autotetraploid, but diploid wild relatives are important sources of genetic variation for breeding.
View Article and Find Full Text PDFJ Integr Plant Biol
September 2025
State Key Laboratory of Plant Environmental Resilience, Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
In higher plants, stomatal movements represent a critical physiological process that matains cellular water homestasis while enabling photosynthetic gas exchange. Open stomata 1 (OST1), a key protein kinase in the abscisic acid (ABA) signaling cascade, has been established as a central regulator of stomatal dynamics. This study reveals that two highly conserved mitogen-activated protein kinase 1 (MAP4K1) and MAP4K2 are positive regulators in ABA promoted stomatal closure, and ABA-activated OST1 potentiates MAP4K1/2 through phosphorylation at conserved serine and threonine residues (S166, T170, and S479/S488).
View Article and Find Full Text PDFMol Plant Microbe Interact
September 2025
Huazhong Agricultural University, College of Life Science and Technology, Wuhan, Hubei , China;
Plant lipid transfer proteins (LTPs), belonging to pathogenesis-related protein 14 family, participate in plant immune response to biotic stress. LTP1 from was previously shown to be able to suppress infection by cowpea mosaic virus and soybean mosaic virus. However, whether cowpea LTP1 participates in the plant resistance to other plant pathogens remains unclear.
View Article and Find Full Text PDFPlant Cell Rep
August 2025
Guizhou Provincial Key Laboratory for Tobacco Quality Improvement and Efficiency Enhancement, Guiyang, 550025, People's Republic of China.
WGCNA mined the unknown gene NtLYK5, and VIGS and RNA-seq analyses suggested that NtLYK5 mediates the negative regulation of hydrogen peroxide production for drought resistance. Drought during the seedling stage of tobacco (Nicotiana tabacum), a water-sensitive and economically important crop, has serious adverse effects on transplant survival and tobacco plant growth. In this study, we conducted transcriptome sequencing on drought-tolerant and drought-sensitive recombinant inbred lines (RILs) from the F7 generation of the cross "NC82 × Bina No.
View Article and Find Full Text PDFPlant Cell Physiol
August 2025
Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, 710-0046, Japan.
Abscisic acid (ABA) signaling in stomatal guard cells is crucial for plants to cope with abiotic stress condition. Pyrabactin is a synthetic agonist of ABA that has a selective affinity to limited isoforms of ABA receptors. Here we investigated the differential utilization of downstream signaling events in guard cell ABA signaling under specific receptor isoforms taking advantage of pyrabactin affinity.
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