Results 1 to 10 of about 1,577 (179)

Microsporogenesis in Monocotyledons [PDF]

Annals of Botany, 1999
This paper critically reviews the distribution of microsporogenesis types in relation to recent concepts in monocot systematics. Two basic types of microsporogenesis are generally recognized: successive and simultaneous, although intermediates occur.
Paula J Rudall, Carol A Furness, Rudall Paula J   +2 more
exaly   +2 more sources

Polyamines in Pollen: From Microsporogenesis to Fertilization [PDF]

Frontiers in Plant Science, 2016
The entire pollen life span is driven by polyamine (PA) homeostasis, achieved through fine regulation of their biosynthesis, oxidation, conjugation, compartmentalization, uptake, and release. The critical role of PAs, from microsporogenesis to pollen-pistil interaction during fertilization, is suggested by high and dynamic transcript levels of PA ...
Iris Aloisi, Giampiero Cai, Stefano Del Duca   +2 more
exaly   +7 more sources

Cryoimmobilized anther analysis reveals new ultrastructural insights into Rhynchospora (Cyperaceae) asymmetrical microsporogenesis [PDF]

Frontiers in Plant Science
IntroductionThe Cyperaceae family is distinguished by holocentric chromosomes and a distinctive microsporogenesis process, which includes inverted meiosis, asymmetric tetrad formation, selective cell death, and the formation of pseudomonad pollen ...
Danilo M. Rocha, Ulla Neumann, Fernanda M. Nogueira, Georgios Tsipas, André L. L. Vanzela, André Marques   +5 more
doaj   +2 more sources

Microsporogenesis of Apricot Cultivars in Hungary

Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 2013
Like all phenological processes, microsporogenesis is mainly determined genetically, but its phenotypical expression is greatly influenced by environmental factors, particularly the temperature.
Veronika HAJNAL, Zarif OMID, Márta LADÁNYI, Magdolna TÓTH, László SZALAY   +4 more
doaj   +3 more sources

Engineering a Gibberellin-Switchable Dual-Use Line Based on Ent-Kaurene Oxidase Gene ZmKO1 Enables Two-Line Hybrid Seed Production in Maize. [PDF]

Plant Biotechnol J
ABSTRACT Male‐sterile systems are pivotal for maize hybrid seed production, yet existing systems are constrained by significant limitations. Here, we identified a novel single‐gene‐controlled recessive genic male sterility (GMS) mutant, defective in filament elongation 1 (def1), which exhibits non‐elongated filaments, unopened glumes, and non‐exserted ...
Li C, Wang S, Xiang Y, Yu T, Wei R, Mei W, Liu X, Yuan P, Yi H, Zhou S, Xia C, Cao M, Lan H.   +12 more
europepmc   +2 more sources

Methodologies and Considerations in Evaluating Heat Stress Response and Thermotolerance of Pollen Grains. [PDF]

Physiol Plant
ABSTRACT Elevated temperatures severely disrupt pollen function, posing a major threat to agricultural productivity. While research into pollen thermotolerance is rapidly expanding, the quest to identify and develop heat‐tolerant crops is challenged by a lack of consistent methodological considerations and experimental design principles.
Miller G, Frencken M, Sapeta H, Gidding F, Geelen D, Kumar P, Rieu I, Lieberman-Lazarovich M.   +7 more
europepmc   +2 more sources

Evaluation of mitotic activity in tapetal cells of grapevine (Vitis L.)

Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 2021
The knowledge with reference to the grapevine tapetum has been centered on its anatomy/morphology and hardly anything at all is known about its mitotic activity throughout the microsporogenesis. The aim of this study was to ascertain the mitotic activity
Neiva Izabel PIEROZZI, Mara FERNANDES MOURA   +1 more
doaj   +1 more source

Evaluation of the course of microsporogenesis in some selected peach (Prunus persica L./Batsch) cultivars [PDF]

Acta Agriculturae Serbica, 2014
The evaluation of the microsporogenesis process was performed from January to April within the period of 2011-2013. The experiment involved 15 peach cultivars and the control cultivar Redhaven. The course of microsporogenesis was evaluated on the base of
Horsáková Jana, Krška Boris
doaj   +1 more source

Flower bud development of almond cultivars based on three different methods

Folia Horticulturae, 2023
Flower bud development of fruit trees plays a key role in their climatic adaptation. It is closely related to dormancy release that determines winter frost susceptibility. Detailed characterisation of flower bud development of 25 almond (Prunus amygdalus
Keleta Belay Teweldemedhin, Szalay László, Ladányi Márta, Békefi Zsuzsanna   +3 more
doaj   +1 more source

Microsporogenesis and systematics of Aristolochiaceae [PDF]

Botanical Journal of the Linnean Society, 2001
Within Aristolochiaceae, a secretory tapetum and orbicules are ubiquitous, but both simultaneous and successive types of microsporogenesis occur. Simultaneous cytokinesis is apparently plesiomorphic within the order Piperales, in which Aristolochiaceae are now placed.
FAVIO GONZÁLEZ, PAULA J. RUDALL, CAROL A. FURNESS   +2 more
openaire   +2 more sources