Results 11 to 20 of about 243,024 (208)

Pollen [PDF]

open access: yesCurrent Biology, 2013
Pollen produced by H. virgata flowerheads in the 1 x 1 m plots also used for nectar measurements. Flowerheads were collected in the morning before insects became active.
Essenberg, Carla J.   +1 more
openaire   +3 more sources

A Plastid-Bound Ankyrin Repeat Protein Controls Gametophyte and Early Embryo Development in Arabidopsis thaliana

open access: yesFrontiers in Plant Science, 2022
Proplastids are essential precursors for multi-fate plastid biogenesis, including chloroplast differentiation, a powerhouse for photosynthesis in plants.
Katarína Kulichová   +5 more
doaj   +1 more source

Pollen biology and hormesis: Pollen germination and pollen tube elongation

open access: yesScience of The Total Environment, 2021
This paper evaluated the occurrence of hormetic dose responses in pollen reported over the past eight decades. Hormetic doses responses were induced by a wide range of chemical and physical agents in 34 plant species for pollen germination and pollen tube growth/elongation.
Edward J, Calabrese   +1 more
openaire   +3 more sources

Dynamics of Endogenous Auxin and Its Role in Somatic Embryogenesis Induction and Progression in Cork Oak

open access: yesPlants, 2023
Somatic embryogenesis (SE) is a feasible in vitro regeneration system with biotechnological applications in breeding programs, although, in many forest species, SE is highly inefficient, mainly due to their recalcitrance. On the other hand, SE represents
Elena Carneros   +5 more
doaj   +1 more source

Evolutionary diversification of cytokinin-specific glucosyltransferases in angiosperms and enigma of missing cis-zeatin O-glucosyltransferase gene in Brassicaceae

open access: yesScientific Reports, 2021
In the complex process of homeostasis of phytohormones cytokinins (CKs), O-glucosylation catalyzed by specific O-glucosyltransferases represents one of important mechanisms of their reversible inactivation.
Lenka Záveská Drábková   +2 more
doaj   +1 more source

Pollen Sporoplasts: Dissolution of Pollen Walls [PDF]

open access: yesPlant Physiology, 1985
4-Methylmorpholine N-oxide monohydrate (MMNO.H(2)O), a potent solvent for polysaccharides, is an effective vehicle for release of membrane-enclosed male gametophytes (sporoplasts) from spore walls. This release occurs in minutes when pollen (Lilium longiflorum Thunb.) is suspended in a melt of MMNO.H(2)O at 75 degrees C. Continued heating at 75 degrees
F A, Loewus   +4 more
openaire   +2 more sources

Development and application of a method to classify airborne pollen taxa concentration using light scattering data

open access: yesScientific Reports, 2021
Although automated pollen monitoring networks using laser optics are well-established in Japan, it is thought that these methods cannot distinguish between pollen counts when evaluating various pollen taxa. However, a method for distinguishing the pollen
Kenji Miki, Toshio Fujita, Norio Sahashi
doaj   +1 more source

Hormonome Dynamics During Microgametogenesis in Different Nicotiana Species

open access: yesFrontiers in Plant Science, 2021
Plant microgametogenesis involves stages leading to the progressive development of unicellular microspores into mature pollen. Despite the active and continuing interest in the study of male reproductive development, little is still known about the ...
Lenka Záveská Drábková   +6 more
doaj   +1 more source

Stress-Induced Microspore Embryogenesis Requires Endogenous Auxin Synthesis and Polar Transport in Barley

open access: yesFrontiers in Plant Science, 2019
Stress-induced microspore embryogenesis is a model in vitro system of cell reprogramming, totipotency acquisition, and embryo development. After induction, responsive microspores abandon their developmental program to follow an embryogenic pathway ...
Yolanda Pérez-Pérez   +5 more
doaj   +1 more source

Pollen characterisation of Maltese honey [PDF]

open access: yes, 2013
In 2004 and 2005, pollen characterisation of 35 samples of honey collected from the islands of Malta and Gozo, was carried out with the aim to identify the botanical origin of honey produced on these islands.
Mifsud, David   +2 more
core   +1 more source

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