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Multilevel genomic constraints shape nuclear tRNA gene organization in plants
The Plant Journal, Volume 127, Issue 3, August 2026.SUMMARY Transfer RNAs (tRNAs) are essential components of the translation machinery. Their abundance and diversity shape decoding capacity as well as the efficiency and accuracy of protein synthesis. Because tRNA abundance is encoded in the genome through tDNA copy number, chromosomal organization, and cis‐regulatory sequences controlling transcription,
Guillaume Hummel +4 more
wiley +1 more source
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Evolution and biogeography of gymnosperms
Molecular Phylogenetics and Evolution, 2014Living gymnosperms comprise only a little more than 1000 species, but represent four of the five main lineages of seed plants, including cycads, ginkgos, gnetophytes and conifers. This group has huge ecological and economic value, and has drawn great interest from the scientific community.
Jin-Hua Ran, Xiao-Quan Wang
exaly +3 more sources
1980
A discussion in gymnosperms as a group is somewhat meaningless so far as discerning trends or ascertaining general principles. It is now generally recognized (1, 2) that g3niinosperms as a class probably never existed, and that gymnospermy should be regarded as a way of life rather than suggesting that the plants possessing naked seeds are somehow ...
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A discussion in gymnosperms as a group is somewhat meaningless so far as discerning trends or ascertaining general principles. It is now generally recognized (1, 2) that g3niinosperms as a class probably never existed, and that gymnospermy should be regarded as a way of life rather than suggesting that the plants possessing naked seeds are somehow ...
openaire +2 more sources
2009
Abstract Gymnosperms, also called Acrogymnospermae (1), are a group of seed-bearing plants (spermatophytes) with ovules on the edge or blade of an open sporophyll or ovuliferous scale (Fig. 1). 7eir closest extant relatives are the angiosperms, which have ovules enclosed in a carpel.
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Abstract Gymnosperms, also called Acrogymnospermae (1), are a group of seed-bearing plants (spermatophytes) with ovules on the edge or blade of an open sporophyll or ovuliferous scale (Fig. 1). 7eir closest extant relatives are the angiosperms, which have ovules enclosed in a carpel.
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Properties of phytochrome in gymnosperms
Planta, 1972Addition of water to dry seeds of Pinus spp. increased the detectable phytochrome immediately and the level reached after 2 h in darkness was retained for at least 20 h at 20° C. The in-vivo difference spectra of phytochrome in Pinus seeds showed absorption maxima at approximately 656 nm and at 710 nm to 715 nm.
R, Grill, C J, Spruit
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Review of Palaeobotany and Palynology, 1976
Features needing elucidation in Mesozoic Cycadales and Bennettitales are given and the Ginkgo—Czekanowskia assemblage is surveyed. Florin's interpretation of the conifer cone scale is discussed in relation to Schweizer's work on Pseudovoltzia. Taxus jurassica Florin is revised and shown to differ generically from Taxus but to share features seen among ...
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Features needing elucidation in Mesozoic Cycadales and Bennettitales are given and the Ginkgo—Czekanowskia assemblage is surveyed. Florin's interpretation of the conifer cone scale is discussed in relation to Schweizer's work on Pseudovoltzia. Taxus jurassica Florin is revised and shown to differ generically from Taxus but to share features seen among ...
openaire +1 more source