Results 81 to 90 of about 142,660 (208)

Fossils and plant evolution: structural fingerprints and modularity in the evo-devo paradigm

EvoDevo, 2022
Fossils constitute the principal repository of data that allow for independent tests of hypotheses of biological evolution derived from observations of the extant biota.
Alexandru M. F. Tomescu, Gar W. Rothwell
doaj   +1 more source

Leptodactylus knudseni [PDF]

, 2006
Number of Pages: 12Integrative BiologyGeological ...
Heyer, Miriam Muedeking, Heyer, W. Ronald   +1 more
core   +1 more source

Self-incompatibility, floral parameters, and pollen characterization in the narrow endemic and threatened species Artemisia granatensis (Asteraceae)

Anales del Jardín Botánico de Madrid, 2011
Artemisia granatensis Boiss. is a paradigmatic species for plant conservation in Spain and Europe. It is a critically endangered (CR) endemic species growing above 2500 m in the Sierra Nevada (southern Spain).
Julio Peñas, Juan Lorite, Francisca Alba-Sánchez, María Angélica Taisma   +3 more
doaj   +1 more source

Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica [PDF]

, 2010
The seed cone Telemachus is known from several Triassic localities in Gondwana. New specimens from two localities in Antarctica provide additional information about the type species, Telemachus elongatus, based on details of morphology and anatomy ...
Decombeix, Anne-Laure, Escapa, Ignacio Hernán, Taylor, Edith L., Taylor, Thomas N.   +3 more
core   +3 more sources

The Use of Plant Extracts to Improve Male Reproductive Performance: A Review Focusing on Mammalian Semen Quality and Preservation

Agriculture
In African countries and many developing countries, communal farmers rely on livestock such as cattle, goats, and sheep to support food security, income, and agricultural activities.
Rantloko Rolly Maapola, Khathutshelo Agree Nephawe, Masindi Lottus Mphaphathi, Jabulani Nkululeko Ngcobo   +3 more
doaj   +1 more source

Cytological characterization and allelism testing of anther developmental mutants identified in a screen of maize male sterile lines. [PDF]

, 2013
Proper regulation of anther differentiation is crucial for producing functional pollen, and defects in or absence of any anther cell type result in male sterility.
Cande, William Zacheus, Golubovskaya, Inna, Harper, Lisa, Lee, Sidae, Skibbe, David S, Timofejeva, Ljudmilla, Walbot, Virginia, Wang, Rachel   +7 more
core   +2 more sources

An integrated QTL and RNA-seq analysis revealed new petal morphology loci in Brassica napus L.

Biotechnology for Biofuels and Bioproducts
Background Rapeseed (Brassica napus L.) is one of the most important oil crops and a wildly cultivated horticultural crop. The petals of B. napus serve to protect the reproductive organs and attract pollinators and tourists.
Huaixin Li, Yutian Xia, Wang Chen, Yanru Chen, Xin Cheng, Hongbo Chao, Shipeng Fan, Haibo Jia, Maoteng Li   +8 more
doaj   +1 more source

Functional analysis of the Arabidopsis TETRASPANIN gene family in plant growth and development [PDF]

, 2015
TETRASPANIN (TET) genes encode conserved integral membrane proteins that are known in animals to function in cellular communication during gamete fusion, immunity reaction and pathogen recognition.
Himanen, Kristiina, Muto, Antonella, Neyt, Pia, Van de Velde, Jan, Van Lijsebettens, Maria, Vandepoele, Klaas, Wang, Feng   +6 more
core   +1 more source

The effect of grass genotype and spring management on the nutritive value of mid-summer ryegrass swards [PDF]

, 2008
End of project reportThe objective of this project was to investigate the environmental, morphological and management factors that control reproductive initiation and development in Lolium perenne L. (perennial ryegrass) and their influence on mid-season
Gilliland, Trevor, Hurley, Grainne, O'Donovan, Michael   +2 more
core  

Variation in a host-epiphyte relationship along a wave exposure gradient [PDF]

, 1991
The red alga Polysiphonia lanosa (L ) Tandy is an obligate epiphyte that primarily occurs on the fucoid brown algal basiphyte Ascophyllum nodosum (L) Le Jolis In the present study we examine how epiphytic interactions between P lanosa and A nodosum vary ...
Levin, Phillip S, Mathieson, Arthur C.
core   +2 more sources