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Picture of the pollen grinding wall breaker
Putting the brakes on pollen wall development: A conserved
2023822 Pollen grains are covered by a complex multi-layered structure, the pollen wall. Exine, the outermost layer of this wall, is made from the biopolymer sporopollenin
Sequential Deposition and Remodeling of Cell
2021727 Despite the importance of pollen development for tomato, little is known about the detailed pollen gain wall developmental process.
Pollen Cell Wall Patterns Form from Modulated
201927 As a phase-separation process approaches equilibrium, the presence of an elastic boundary and spatial confinement, like the cell
Formation pattern and regulatory mechanisms of pollen wall in
202151 Abstract. In angiosperms, mature pollen is wrapped by a pollen wall, which is important for maintaining pollen structure and function. Pollen walls provide protection
Pollen wall degradation in the Brassicaceae permits cell
2021613 Pollen wall morphology, studied since the 17th century ( Grew, 1682 ; Erdtman, 1952,is better described than wall materials and known for most pollen grains
Effects of postharvest irradiation and superfine grinding wall
202161 Effects of irradiation and superfine grinding wall disruption treatment on quality parameters and antioxidant activity of pine pollen during storage at 55 °C for 8
The Pollen Wall: Structure and Development ScienceDirect
197111 This chapter discusses the stratification of angiosperm pollen grain walls. Pores and slits form conspicuous features of the pollen wall. Shortly before final
Pollen wall patterns as a model for biological self‐assembly
2020929 In this piece, I highlight the current understanding of pollen wall biology relevant for quantification studies and enumerate the modellable aspects of pollen wall
Frontiers A Complex Journey: Cell Wall
20201130 In this review, we focus on the most recent advances in elucidating the molecular mechanisms involved in the regulation of cell wall synthesis and modification during pollen germination, pollen tube growth,
The temporal regulation of TEK contributes to
2020514 This work reveals that a pollen wall regulator must be kept under a strict temporal control to perform its functions, and that these temporal controls are coordinated with other pollen wall developmental
The Pollen Wall: Structure and Development ScienceDirect
197111 Publisher Summary. This chapter discusses the stratification of angiosperm pollen grain walls. Pores and slits form conspicuous features of the pollen wall. Shortly before final maturation of the pollen grains, surface coatings of various kinds are acquired, derived from secretory or breakdown products of the tapetum.
Effects of ultrasound assisted cell wall disruption on
202311 The bee pollen was grounded with a grinder (Breville, BCG 300, Australia) for 2 mins and passed through a 150-mesh sieve. Then 100 g grounded pollen was dispersed in 1200 mL petroleum ether for oil extraction. Ultrasound wall-broken (U): 10 g defatted pollen was added into 120 mL distilled water and the dispersion was treated at
Pollen wall development in flowering plants New
2017106 The outer pollen wall, or exine, is more structurally complex than any other plant cell wall, comprising several distinct layers, each with its own organizational pattern. Since elucidation of the basic events of pollen wall ontogeny using electron micros-copy in the 1970s, knowledge of their developmental genetics has increased enor-mously.
Pollen wall patterns as a model for biological self‐assembly
2020929 Pollen wall patterning is an extraordinarily complex process that involves many macromolecular components, genes, and likely physicochemical processes. Most research on the components and roles of the primexine, PM, callose wall, and aperture-patterning components has been limited to model systems, and it is not known if these
Effects of postharvest irradiation and superfine grinding wall
202161 The results indicated that irradiation at 6.0 kGy did not change the fatty acids in pine pollen, while superfine grinding wall disruption could increase all the fatty acids' content. More extraction of fatty acids in pine pollen after superfine grinding wall disruption may explain this increase (Chen et al., 2015). After 8 weeks of storage, the
Pollen wall development in flowering plants New
2017106 The outer pollen wall, or exine, is more structurally complex than any other plant cell wall, comprising several distinct layers, each with its own organizational pattern. Since elucidation of the basic events of pollen wall ontogeny using electron micros-copy in the 1970s, knowledge of their developmental genetics has increased enor-mously.
Pollen Cell Wall Patterns Form from Modulated Phases
201927 A single physical theory accounts for pollen cell wall pattern diversity. •. Pollen patterns form by primexine phase separation coupled to membrane undulations. •. This process reaches equilibrium in some taxa; most patterns form in kinetic arrest. •. Arrested patterns evolve more rapidly than equilibrated patterns.
Effects of 60Co-irradiation and superfine grinding wall
2021530 Effects of 60 Co-irradiation and superfine grinding wall disruption on the phenolic, antioxidant activity, and α-glucosidase-inhibiting potential of pine pollen were investigated. Eight soluble phenolics (SP) and insoluble-bound phenolic (IBP) compounds were characterized for the first time. After 60 Co-irradiation, total phenolic content (TPC)
The biosynthesis, composition and assembly of the outer pollen wall
201463 Pollen wall is primarily composed of the primexine consisting of the polysaccharide cellulose (Ariizumi and Toriyama, 2011) and sporopollenin, a highly cross-linked polymer (Paxson-Sowders et al
Pollen wall degradation in the Brassicaceae permits cell
2021613 Pollen wall morphology, studied since the 17th century ( Grew, 1682 ; Erdtman, 1952,is better described than wall materials and known for most pollen grains to include a sporopollenin exine out-side a cellulosic and pectin-rich intine. Th e exine itself is further divided into an outer, oft en-sculpted sexine and inner, continuous
Formation pattern and regulatory mechanisms of pollen wall in
202151 1. Introduction. Pollen development is a complex process that mainly includes the division and differentiation of anther primordial cells, the meiosis of microsporocytes, the formation of the pollen wall, and the release of pollen grains (Wilson and Zhang, 2009; Hesse et al., 2016).Among these steps, the formation of the pollen wall
CNU Organic rose pollen water-cooling grinding
The utility model relates to a rose pollen production technical field especially relates to an organic rose pollen water-cooling grinds breaker, and the water-cooling that has solved among the prior art grinds crushing apparatus and only directly discharges pollen material, adopts simple bearing frame to bear, does not carry out in time drying to pollen material,
Effects of postharvest irradiation and superfine grinding wall
202161 Effects of irradiation and superfine grinding wall disruption treatment on quality parameters and antioxidant activity of pine pollen during storage at 55 °C for 8 weeks were investigated. Results showed that irradiation slowed the reduction of taxifolin and ascorbic acid levels and the increase of ferric-ion reducing antioxidant power (FRAP), but
Pollen Cell Wall Patterns Form from Modulated Phases: Cell
201927 A single physical theory accounts for pollen cell wall pattern diversity. •. Pollen patterns form by primexine phase separation coupled to membrane undulations. •. This process reaches equilibrium in some taxa; most patterns form in kinetic arrest. •. Arrested patterns evolve more rapidly than equilibrated patterns.
Sequential Deposition and Remodeling of Cell Wall Polymers
2021727 The cell wall of a mature pollen grain is a highly specialized, multilayered structure. The outer, sporopollenin-based exine provides protection and support to the pollen grain, while the inner intine, composed primarily of cellulose, is important for pollen germination. The formation of the mature pollen grain wall takes place within the anther
Pollen wall development in flowering plants Blackmore
2007417 The outer pollen wall, or exine, is more structurally complex than any other plant cell wall, comprising several distinct layers, each with its own organizational pattern. Since elucidation of the basic events of pollen wall ontogeny using electron microscopy in the 1970s, knowledge of their developmental genetics has increased enormously.
Pollen Definition, Structure and Formation Biology
2017819 Pollen Definition. Pollen refers to the powdery product synthesized by seed plants responsible for the production of the male gametes of the plant (shown below). The pollen grains are termed microgameteophytes, and consist of a sporopollenin coating which serves to protect the gameteophytes as they are transported from the stamens (male) or
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Effects of 60Co-irradiation and superfine grinding wall
202151 After superfine grinding wall disruption, the TPC and TFC in IBP increased by 80.24% and 27.24%, respectively; in pine pollen, they increased by 22.66% and 10.61%, respectively; whereas they were