Pollination and Fertilization

Davison, W A

doi:10.1007/978-1-4020-9602-0_6

Cited by 3 publications

(3 citation statements)

References 39 publications

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“…As a result of the pistil formation, pollen germinated on the stigma being not protected from the direct influence of the environment [12,[39][40][41][42][43][44]. Pollen grains of gymnosperms germinate in a specific pollen chamber and further development of the male gametophyte occurs over a relatively long period of time [45][46][47]. Germination of angiosperm pollen grains on the stigma should have been carried out for a much shorter time [48].…”

Section: Aromorphosismentioning

confidence: 99%

“…Plant Reproductive Ecology -Recent Advances fertilization in gymnosperms is much longer as compared to angiosperms. It ranges from 10 h to more than 12 months (fertilization occurs in the spring or summer of the next year), except for Gnetum and Ephedra, which have a fertilization interval of 6-8 days and 10-36 h, respectively [46][47][48]. Accelerated pollen tube growth rate in angiosperms is considered as a critical innovation that preceded the origin of the closed carpel, long styles, and multiseeded ovaries [40].…”

Section: Figurementioning

confidence: 99%

“…Such modus of evolution of the female gametophyte in angiosperms (it also occurs in Gnetum) [46], as the combination of stages of macrosporogenesis and the embryo Types of microsporangium wall formation [61].…”

Section: Embryo Sacmentioning

confidence: 99%

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Evolutionary Patterns of the Internal Structures of Generative Organs in Angiosperm Plants

Kordyum¹,

Kravets²

2022

Plant Reproductive Ecology - Recent Advances

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Evolutionary patterns of the internal structures of generative organs in angiosperms are considered in light of the idea on their close dependence on the appearance of angiospermy – formation of the ovary closed cavity by carpels– macrosporophylls. A characteristic feature of the sexual process in gymno- and angiosperms is the independency of water for fertilization, unlike all lower plants and pteridophytes. The main direction of the further evolution of the sexual process consisted in the modification for adaptations that ensure the successful fertilization in new conditions. The guidelines and levels of evolution include aromorphosis, allomorphosis, specialization and reduction which are considered to be concrete examples of microstructure of generative organs.

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Section: Aromorphosismentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Evolutionary Patterns of the Internal Structures of Generative Organs in Angiosperm Plants

Kordyum¹,

Kravets²

2022

Plant Reproductive Ecology - Recent Advances

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Spatial genetic structure and seed quality of a southernmost Abies nephrolepis population

Kim,

Lee,

Kim

et al. 2023

Sci Rep

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Abies nephrolepis (Trautv. ex Maxim.) Maxim. has its southernmost populations in South Korea and they are expected to decline under climate change. To establish a strategic conservation plan, this study aimed to investigate the spatial genetic structure and seed characteristics of A. nephrolepis. We used nine microsatellite markers on 165 individuals of A. nephrolepis and sampled seeds in a southernmost population at Mt. Hambaeksan, South Korea. We observed a high level of heterozygosity, and a simulation study found that sampling 20 individuals was enough to secure sufficient genetic diversity on average. Spatial autocorrelation analysis revealed that individuals had a positive genetic relationship until 30 m. Bayesian clustering models, STRUCTURE and GENELAND, failed to achieve a consensus in the optimal number of population (K), estimating K = 1 and K = 2, respectively. Principal coordinate analysis supported the absence of genetic substructure within the study population. There was a large variance in seed production among mother trees. On average, seeds of A. nephrolepis from Mt. Hambaeksan had a purity of 70.4% and a germination percentage of 32.2%. We found that seed weight was the most effective indicator of seed quality. Mother trees at higher altitudes had poorer purity which is threatening to A. nephrolepis considering the upslope retreat of subalpine species under climate change. Our results provide insights into the interactions among spatial processes, genetic structure, and seed quality within a population of A. nephrolepis.

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Spatial Genetic Structure and Seed Quality of a Southernmost Abies nephrolepis Population

Kim

Lee

Kim

et al. 2023

Preprint

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Abies nephrolepis(Trautv. ex Maxim.) Maxim. has its southernmost populations in South Korea and they are expected to decline under climate change. To establish a strategic conservation plan, this study aimed to investigate the spatial genetic structure and seed characteristics of A. nephrolepis. We used nine microsatellite markers on 165 individuals of A. nephrolepis and sampled seeds in a southernmost population at Mt. Hambaeksan, South Korea. We observed a high level of heterozygosity, and a simulation study found that sampling 20 individuals was enough to secure sufficient genetic diversity on average. Spatial autocorrelation analysis revealed that individuals had a positive genetic relationship until 30 m. Bayesian clustering models, STRUCTURE and GENELAND, failed to achieve a consensus in the optimal number of population (K), estimating K=1 and K=2, respectively. Principal coordinate analysis supported the absence of genetic substructure within a population. There was a large variance in seed production among mother trees. On average, seeds of A. nephrolepis from Mt. Hambaeksan had a purity of 70.4% and germination percentage of 32.2%. We found that seed weight was the most effective indicator of seed quality. Mother trees at higher altitudes had poorer purity which is threatening to A. nephrolepis considering the upslope retreat of subalpine species under climate change. Our results provide insights into the interactions among spatial processes, genetic structure, and seed quality within a population of A. nephrolepis.

show abstract

Pollination and Fertilization

Cited by 3 publications

References 39 publications

Evolutionary Patterns of the Internal Structures of Generative Organs in Angiosperm Plants

Evolutionary Patterns of the Internal Structures of Generative Organs in Angiosperm Plants

Spatial genetic structure and seed quality of a southernmost Abies nephrolepis population

Spatial Genetic Structure and Seed Quality of a Southernmost Abies nephrolepis Population

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