Results 71 to 80 of about 57,214 (301)

Pectin Methylesterase, a Regulator of Pollen Tube Growth [PDF]

Plant Physiology, 2005
Abstract The apical wall of growing pollen tubes must be strong enough to withstand the internal turgor pressure, but plastic enough to allow the incorporation of new membrane and cell wall material to support polarized tip growth. These essential rheological properties appear to be controlled by pectins, which constitute the principal ...
Maurice, Bosch, Alice Y, Cheung, Peter K, Hepler   +2 more
openaire   +2 more sources

A Virus‐Inducible E3–RLCK–MADS Module Coordinates Suppression of Plant Immunity and Fertility in Rice

Advanced Science, EarlyView.
ABSTRACT Viruses often hijack host developmental programs to promote infection, but the mechanistic links between reproductive regulation and antiviral immunity remain incompletely understood. Here, we identify a virus‐triggered hierarchical degradation cascade that links antiviral immunity and fertility regulation in rice. We show that the rice grassy
Yuansheng Wu, Fengling Wu, Shiting Huang, Denglu Yang, Xin Lei, Xue Zhang, Na Liu, Peng Gan, Chuan Li, Jie Zhang, Ming Wu, Qingxiao Jia, Shanshan Zhao, Jianguo Wu   +13 more
wiley   +1 more source

The Arabidopsis GPI-anchored protein COBL11 is necessary for regulating pollen tube integrity

Cell Reports, 2023
Summary: Pollen tube integrity is required for achieving double fertilization in angiosperms. The rapid alkalinization factor4/19-ANXUR1/2-Buddha’s paper seal 1/2 (RALF4/19-ANX1/2-BUPS1/2)-complex-mediated signaling pathway is critical to maintain pollen
Hongxia Li, Yang Yang, Hongkai Zhang, Chengying Li, Pingzhou Du, Mengmeng Bi, Tao Chen, Dong Qian, Yue Niu, Haiyun Ren, Lizhe An, Yun Xiang   +11 more
doaj   +1 more source

A rapid, inexpensive, and semi-quantitative method for determining pollen tube extension using fluorescence [PDF]

, 2014
BACKGROUND: Pollen tubes extend rapidly when pollen grains are incubated in defined media. Tube extension requires many critical functions of plant cells including molecular signaling, cytoskeleton remodeling, secretion, and cell wall synthesis ...
Amit Basu, Clara Levy, David M Kern, Emily Hartman, Mark A Johnson   +4 more
core   +1 more source

Fast Pollen Tube Growth in Conospermum Species [PDF]

Annals of Botany, 2004
An unusual form of pollen tube growth was observed for several Conospermum species (family Proteaceae). The rate of pollen tube growth, the number of tubes to emerge and the ultrastructure of these tubes are given here.Pollen was germinated in vitro in different sucrose concentrations and in the presence of calcium channel blockers, and tube emergence ...
Stone, L.M., Seaton, K.A., Kuo, J., McComb, J.A.   +3 more
openaire   +2 more sources

SERRATE Regulates Floral Meristem Activity by Antagonizing SHOOT MERISTEMLESS and Repressing Cytokinin Signaling

Advanced Science, EarlyView.
Floral meristem (FM) activity is crucial for the initiation of floral organs. In this study, SE represses IPT7 expression and cytokinin signaling via both the miR171c‐5p–KNAT2 and miR164c–CUC1/2–KNAT2 regulatory modules, thereby repressing FM activity. In contrast, STM induces both KNAT2 and IPT7 expression.
Wen Yang, Yiting Wang, Yuxin You, Zhiyue Wu, Dongbao Li, Xin Wang, Yongsheng Chang, Hang Zhao, Tao Zhu, Dijun Chen, Wei Chen, Bo Sun   +11 more
wiley   +1 more source

Dissecting the regulation of pollen tube growth by modelling the interplay of hydrodynamics, cell wall and ion dynamics

Frontiers in Plant Science, 2014
Hydrodynamics, cell wall and ion dynamics are all important properties that regulate pollen tube growth. Currently, the two main pollen tube growth models, the cell wall model and the hydrodynamic model do not appear to be reconcilable.
Junli eLiu, Patrick J. Hussey
doaj   +1 more source

A compartmental model analysis of integrative and self-regulatory ion dynamics in pollen tube growth. [PDF]

PLoS ONE, 2010
Sexual reproduction in higher plants relies upon the polarised growth of pollen tubes. The growth-site at the pollen tube tip responds to signalling processes to successfully steer the tube to an ovule.
Junli Liu, Bernard M A G Piette, Michael J Deeks, Vernonica E Franklin-Tong, Patrick J Hussey   +4 more
doaj   +1 more source

A Tobacco Homolog of DCN1 is Involved in Cellular Reprogramming and in Developmental Transitions [PDF]

, 2011
Plant proteomes show remarkable plasticity in reaction to environmental challenges and during developmental transitions. Some of this adaptability comes from ubiquitin-mediated protein destruction regulated by cullin-RING E3 ubiquitin ligases (CRLs ...
Alexandra Ribarits, Alisher Tashpulatov, Alisher Touraev, Christina Friedmann, Elisabeth Ankele, Erwin Heberle-Bors, Julia Hosp, Katarzyna Szaszka, Klaus Palme, Marina Baumann, Tatiana Resch, Viktor Voronin, Yongfeng Jin   +12 more
core   +1 more source

Evaluating the African arid corridor hypothesis: A meta‐analysis including the phylogenetic and biogeographical history of Sesamothamnus

American Journal of Botany, EarlyView.
Abstract Premise We examined the African arid corridor (AAC) disjunction pattern of vascular plants between northeastern and southwestern Africa in the context of geological and climatic events since the late Miocene. We developed a phylogenetic and biogeographical framework for the arid‐adapted genus Sesamothamnus (Pedaliaceae), a classic example of ...
John G. Zaborsky, Jeffrey P. Rose, Ricardo Kriebel, Bryan T. Drew, Emily Moriarty Lemmon, Alan R. Lemmon, Kenneth J. Sytsma   +6 more
wiley   +1 more source