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Reproductive Performance of the Alpine Plant Species in a Climatic Elevation Gradient: Apomictic Tetraploids Do Not Show a General Fitness Advantage over Sexual Diploids.
Life (Basel)
September 2024
Department of Botany, Functional Plant Biology, University of Innsbruck, Sternwartestrasse 15, A-6020 Innsbruck, Austria.
Previous studies on the mountain plant concluded that apomictic self-compatible tetraploids have experienced a niche shift toward a colder climate during the Holocene, which suggests a fitness advantage over the sexual, self-sterile diploid parents under cold and stressful high-mountain conditions. However, there is still a lack of information on whether reproductive development would be advantageous for tetraploids. Here, we report on microsporogenesis, megagametogenesis, the dynamics of flower and seed development, and the consequences for reproductive success in a common garden experiment along a 1000 m climatic elevation gradient and in natural populations.
View Article and Find Full Text PDFEctopic expression of a thaumatin-like protein impairs the timely deposition and dissolution of callose during microsporogenesis, leading to microspore death and male sterility in Arabidopsis.
Plant Reprod
September 2024
School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
Two pollen-preferential thaumatin-like proteins show both common and distinctive expression profiles. Precocious expression of one of them drastically disturbs timely deposition and dissolution of callose during microsporogenesis, leading to microspore death. Thaumatin-like proteins (TLPs), members of the pathogenesis-related protein family 5 (PR-5), are involved in plant defenses against biotic and abiotic stresses through antifungal activity and enhanced tolerance.
View Article and Find Full Text PDFMale vitellogenin regulates gametogenesis through a testis-enriched big protein in Chrysopa pallens.
Insect Mol Biol
February 2024
Key Laboratory of Natural Enemy Insects, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China.
In insects, vitellogenin (Vg) is generally viewed as a female-specific protein. Its primary function is to supply nutrition to developing embryos. Here, we reported Vg from the male adults of a natural predator, Chrysopa pallens.
View Article and Find Full Text PDFThe novel expression of clonality following whole-genome multiplication compensates for reduced fertility in natural autopolyploids.
Proc Biol Sci
June 2023
Herbarium Collections and Department of Botany, Charles University, Prague, Czechia.
Exploring the fitness consequences of whole-genome multiplication (WGM) is essential for understanding the establishment of autopolyploids in diploid parental populations, but suitable model systems are rare. We examined the impact of WGM on reproductive traits in three major cytotypes (2, 3, 4) of , a species with recurrent formation of neo-autopolyploids in mixed-ploidy populations. We found that diploids had normal female sporogenesis and gametogenesis, high fertility, and produced predominantly euploid seed progeny.
View Article and Find Full Text PDFDietary phytoestrogen diosgenin interrupts metabolism, physiology, and reproduction of Swiss albino mice: Possible mode of action as an emerging environmental contaminant, endocrine disruptor and reproductive toxicant.
Food Chem Toxicol
June 2023
Department of Zoology, Mizoram University, Aizawl, 796004, Mizoram, India. Electronic address:
Dietary phytoestrogens are the main source of environmental contamination due to their estrogen-mimicking and endocrine-disrupting effects, posing a threat to microbial, soil, plant, and animal health. Diosgenin, a phytosteroid saponin, is used in many traditional medicines, nutraceuticals, dietary supplements, contraceptives, and hormone replacement therapies against numerous diseases and disorders. It is important to be aware of the potential risks associated with diosgenin, as well as its potential to cause reproductive and endocrine toxicity.
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