Results 101 to 110 of about 220,475 (309)

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

Genome-Wide Identification of Petunia Hsp20 Gene Family and Functional Characterization of MYC2a-Regulated CIV Subfamily in Pollen Development

Agronomy
Plant heat shock proteins (Hsps) are from a diverse and ancient protein family, with small Hsps of ~20 kDa molecular weight classified as Hsp20s. As a key transcription factor in the jasmonic acid (JA) pathway, myelocytomatosis protein 2 (MYC2) plays a ...
Xuecong Zhou, Bingru Zhang, Yilin Wang, Letian Wang, Jiajun Tang, Bingyan Zhao, Qian Cheng, Juntao Guo, Hang Zhang, Huirong Hu   +9 more
doaj   +1 more source

Evidence for a role of Arabidopsis CDT1 proteins in gametophyte development and maintenance of genome integrity [PDF]

, 2012
Meristems retain the ability to divide throughout the life cycle of plants, which can last for over 1000 years in some species. Furthermore, the germline is not laid down early during embryogenesis but originates from the meristematic cells relatively ...
Benhamed, Moussa, Bergounioux, Catherine, Blanchet, Sophie, Bourge, Mickaël, De Jaeger, Geert, De Veylder, Lieven, Domenichini, Séverine, Raynaud, Cécile, Van De Slijke, Eveline   +8 more
core   +3 more sources

Interactions between maternal provisioning and natural selection on seed mass fluctuate across heat waves

American Journal of Botany, EarlyView.
Abstract Premise Changing climates are leading to more frequent and severe heat waves, potentially threatening plant populations. Both acclimation to stress and selection for heat‐escape or heat‐resistance phenotypes occur during heat waves. However, plastic responses and selection do not necessarily interact cohesively—even producing trait responses ...
Lana F. Gaspard, Elissa Harb, Stacy D. Holt Jr., Courtney M. Patterson, Nicholas J. Kooyers   +4 more
wiley   +1 more source

Promoted ABA Hydroxylation by Capsicum annuum CYP707As Overexpression Suppresses Pollen Maturation in Nicotiana tabacum

Frontiers in Plant Science, 2020
Abscisic acid (ABA) is a key signaling molecule that mediates plant response to stress. Increasing evidence indicates that ABA also regulates many aspects of plant development, such as seed germination, leaf development, and ripening.
Hyun Min Kim, Se Hee Park, Sang Hoon Ma, Seo Young Park, Chul-Ho Yun, Geupil Jang, Young Hee Joung   +6 more
doaj   +1 more source

The dose makes the poison: have “field realistic” rates of exposure of bees to neonicotinoid insecticides been overestimated in laboratory studies? [PDF]

, 2014
Recent laboratory based studies have demonstrated adverse sub-lethal effects of neonicotinoid insecticides on honey bees and bumble bees, and these studies have been influential in leading to a European Union moratorium on the use of three neonicotinoids,
BARON G L, BONMATIN J M, BONMATIN J M, CARRECK N L, EUROPEAN COMMISSION, EUROPEAN FOOD SAFETY AUTHORITY, EUROPEAN FOOD SAFETY AUTHORITY, EUROPEAN FOOD SAFETY AUTHORITY, FELTHAM H, Francis L W Ratnieks, GARBUZOV M, MAUS C, Norman L Carreck, OSBORNE J L, SCHMUCK R, SCHÖNING R, THOMPSON H   +16 more
core   +1 more source

Manifold limits on seed production by individual flowering plants

American Journal of Botany, EarlyView.
Abstract Premise Historically, angiosperm seed production has been considered to be either pollen or resource limited. However, seed production involves more than pollen and seed resources and typically involves multiple ovules in multiple flowers. Therefore, various constraints may act simultaneously. Methods Proportional components of seed production
Lawrence D. Harder, Nathaniel J. Hamnett‐Mount   +1 more
wiley   +1 more source

Iron Age to Medieval entomogamous vegetation and Rhinolophus hipposideros roost in south-eastern Wales (UK) [PDF]

, 2006
Karst cave systems are well developed in Wales (UK) and, in some instances, constitute important bat roosts. Ogof Draenen, near Blaenavon in south-east Wales, is the most recent major cave discovery (1994) with already > 70 km of passages explored ...
Bronk, Bui-Thi, Camacho, Carbonnel, Carbonnel, Carrión, Chambers, Chambers, Coles, Herrera, Jegla, Maher, Maher, Michael J. Simms, Pendleton, Proctor, Rosen, Simms, Simms, Smith, Stuiver, Suzanne A.G. Leroy, Vaughan, Waltham, Warren   +24 more
core   +1 more source

Local Specific IgE Levels Can Predict and Monitor the Therapeutic Response to Subcutaneous Immunotherapy With House Dust Mite

International Forum of Allergy &Rhinology, EarlyView.
ABSTRACT Background Identifying predictive and monitoring biomarkers for allergen immunotherapy response is crucial for enhancing clinical efficacy. This study aims to investigate the systemic and local levels of immunoglobulins and identify potential biomarkers in house dust mite (HDM) allergic rhinitis (AR) patients who are undergoing subcutaneous ...
Xu Xu, Jingyun Li, Xu Zhang, Yu Song, Lin Xi, Luo Zhang, Yuan Zhang   +6 more
wiley   +1 more source

Genome-scale analysis and comparison of gene expression profiles in developing and germinated pollen in Oryza sativa

BMC Genomics, 2010
Background Pollen development from the microspore involves a series of coordinated cellular events, and the resulting mature pollen has a specialized function to quickly germinate, produce a polar-growth pollen tube derived from the vegetative cell, and ...
Xue Yongbiao, Su Zhen, Deng Zhu Y, Xu Wen Y, Wei Li Q, Wang Tai   +5 more
doaj   +1 more source