Results 221 to 230 of about 19,459 (297)

Preliminary Research on the Possibility of Automating the Identification of Pollen Grains in Melissopalynology Using AI, with Particular Emphasis on Computer Image Analysis Methods. [PDF]

Sensors (Basel)
Litwińczyk K, Podralski M, Skorynko P, Malinowska E, Czarnota Z, Bąk B, Janowski A.   +6 more
europepmc   +1 more source

ATXR5 and ATXR6 restrict meiotic crossover formation within heterochromatin in Arabidopsis

Journal of Integrative Plant Biology, EarlyView.
The Arabidopsis H3K27 mono‐methyltransferases ATXR5 and ATXR6 repress crossovers within meiotic heterochromatin, are required for heterochromatin condensation and H3K27me1 establishment, and specifically influence the maintenance of DNA methylation in meiocytes.
Jun Zhang, Yue Yu, Han Wang, Meiling Li, Dingning Li, Chenjiang You, Yingxiang Wang, Cong Wang   +7 more
wiley   +1 more source

Real-time quantification of pollen release: from liquid suspensions to airborne counting. [PDF]

J Exp Bot
Buchmann SL.
europepmc   +1 more source

Orchid genome evolution and trait innovation

Journal of Integrative Plant Biology, EarlyView.
Orchids became one of the world's most diverse plant groups through genome‐driven innovations, unique relationships with fungi and pollinators, and remarkable adaptability. This review explains the origins of orchids and the evolution of their distinctive life forms, flowers, and ecological strategies and highlights promising directions for future ...
Meng‐Yao Zeng, Cheng‐Yuan Zhou, Linying Wang, Jie Gao, Weilun Yin, Dong‐Hui Peng, Siren Lan, Feng‐Xi Yang, Zhong‐Jian Liu   +8 more
wiley   +1 more source

The enigmatic historical record of the leaf beetle <i>Acentroptera norrisii</i> in Spain: failed biological introduction or curatorial artefact? [PDF]

PeerJ
Sánchez Albert A, López-Sáez JA, Modolell I, Lawrence P, París M.   +4 more
europepmc   +1 more source

Thermogenesis‐derived spatiotemporal microclimates guide pollinator movement to ensure pollination

Journal of Integrative Plant Biology, EarlyView.
Alocasia odora's microclimatic heterogeneity guides Colocasiomyia fly movement within its inflorescence. During the female stage, midday heat in the upper spadix pushes flies down to the cooler female zone. During the male stage, nocturnal warmth in the upper part pulls flies upward and spathe constriction closes the lower female chamber.
Yuanjun Yu, Yan Luo, Wufan Zhang, Xiang Ding, Xiqiang Song, Yibo Luo   +5 more
wiley   +1 more source

Comparative Study on Cytological Characteristics of Reproductive Organs and Embryonic Development in Three Forms of the Mycoheterotrophic Orchid <i>Gastrodia elata</i>. [PDF]

Plants (Basel)
Diao H, Guo S.
europepmc   +1 more source

Improving classification of pollen grain images of the POLEN23E dataset through three different applications of deep learning convolutional neural networks. [PDF]

PLoS One, 2018
Sevillano V, Aznarte JL.
europepmc   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

Gain Curves, Reproductive Efficiency, and Sex Allocation. [PDF]

Ecol Evol
Burd M.
europepmc   +1 more source