Results 31 to 40 of about 9,112 (248)

Development of Embryo Suspensors for Five Genera of Crassulaceae with Special Emphasis on Plasmodesmata Distribution and Ultrastructure

open access: yesPlants, 2020
The suspensor in the majority of angiosperms is an evolutionally conserved embryonic structure functioning as a conduit that connects ovule tissues with the embryo proper for nutrients and growth factors flux.
Małgorzata Kozieradzka-Kiszkurno   +5 more
doaj   +1 more source

Megasporogenesis and Megagametogenesis in Coelogyne speciosa subsp. fimbriata (J.J.Sm.) Gravendeel (Orchidaceae Juss.)

open access: yesInternational Journal of Plant Biology, 2023
Understanding the critical stages in ovule development is essential for optimizing in vitro seed propagation, cryopreservation, and indirect somatic plant embryogenesis.
Galina Kolomeitseva   +3 more
doaj   +1 more source

Expanded application to plant reproductive tissues of a branched DNA probe‐based in situ hybridization method

open access: yesApplications in Plant Sciences, EarlyView.
Abstract Premise Detecting clear tissue‐ and organ‐specific patterns of gene expression is key to understanding the genetic mechanisms that control plant development. In situ hybridization (ISH) of mRNA is one of the most precise, yet most challenging approaches to gene expression assays.
Brooklyn M. Anaya   +3 more
wiley   +1 more source

Peculiarities of the reproductive processes in the gymnosperms. Gametophytes’ development, pollination and fertilization

open access: yesБіологічні студії, 2013
The review contains the analysis of the latest literature sourses reproductive processes in gymnosperms, namely gametophytes development, рollination, fertilization.
A. Odintsova, A. Rugusova
doaj   +1 more source

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

open access: yesThe Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

Flower Biology and the Effects of Different Chemicals on Pollen Germination of Some Early Sweet Cherry Cultivars

open access: yesBrazilian Archives of Biology and Technology, 2021
Sweet cherry fruit is a tasty and valuable product for consumers. In order to increase the export share of cherry, which is also very important in export, it is beneficial to grow with cherry varieties that mature at different times. The cherries offered
Hasan Cumhur Sarısu
doaj   +1 more source

Clade‐wide morphological and functional variation of the sauropsid columella

open access: yesThe Anatomical Record, EarlyView.
Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock   +4 more
wiley   +1 more source

ABOUT ARRANGEMENT OF THE HAIRS ON THE EPIDERMIS OF COTTON SEED [PDF]

open access: yesJournal of Central European Agriculture, 2006
The character of an arrangement of the hairs on seeds of fi ve cotton cultivars has been investigated. Unknown feature has been found in the processes of the cells-hairs appearance from the epidermis of ovule-seed.
V Krakhmalev, A Paiziev
doaj  

Structural aspects of the zygotic embryogenesis of Acca sellowiana (O. Berg) Burret (Myrtaceae) Aspectos estruturais da embriogênese zigótica em Acca sellowiana (O. Berg) Burret (Myrtaceae)

open access: yesActa Botânica Brasílica, 2009
Acca sellowiana has anatropous, bitegmic and crassinucellate ovules. The outer and inner integuments are double-layered except in the micropyle, where they are composed of more layers; the micropyle is zig-zag shaped.
Rosete Pescador   +3 more
doaj   +1 more source

Overexpression of GhSWEET42, a SWEET-like gene from cotton, enhances the oil content and seed size

open access: yesBiotechnology & Biotechnological Equipment, 2023
SWEET (‘sugars will eventually be exported transporters’) family genes reportedly play a critical role in sugar translocation and oil biosynthesis in various plant species. However, their functions in cotton are unknown.
Deying Wang   +5 more
doaj   +1 more source

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