Results 61 to 70 of about 23,140 (218)

The flattened and needlelike leaves of the pine family (Pinaceae) share a conserved genetic network for adaxial-abaxial polarity but have diverged for photosynthetic adaptation

open access: yesBMC Evolutionary Biology, 2020
Background Leaves have highly diverse morphologies. However, with an evolutionary history of approximately 200 million years, leaves of the pine family are relatively monotonous and often collectively called “needles”, although they vary in length, width
Hong Du   +3 more
doaj   +1 more source

Composition analysis of exudates produced by conifers grown in Taiwan and their antifungal activity

open access: yesJournal of Wood Science, 2022
Exudates are involved in the defense mechanism of trees; they could work against insects or microorganisms through a physical or chemical system. The main components of exudates are terpenoids. This study identified the main compounds of exudates from 13
Nai-Wen Tsao   +4 more
doaj   +1 more source

Host Shift Speciation of the Ectomycorrhizal Genus Suillus (Suillineae, Boletales) and Biogeographic Comparison With Its Host Pinaceae

open access: yesFrontiers in Microbiology, 2022
Suillus is a genus of ectomycorrhizal fungi associated almost exclusively with Pinaceae. Lack of sample collections in East Asia and unresolved basal phylogenetic relationships of the genus are the major obstacles for better understanding the Suillus ...
Rui Zhang   +15 more
doaj   +1 more source

Growth response of lutz spruce saplings to the removal of a herbaceous competitor and the application of fertilizer in Southeast Alaska [PDF]

open access: yes, 2014
Thesis (M.S.) University of Alaska Fairbanks, 2014.Herbaceous competitor species such as fireweed can impact future survival and growth of Lutz (Picea x lutzii Little, Pinaceae) spruce saplings. Fertilizer is applied to crop trees in order to supply more
Dickson, Emily
core  

The History of Expansion of the Genus Bursaphelenchus (Nematoda: Aphelenchida: Parasitaphelenchidae) [PDF]

open access: yes, 2008
Because of globalization and removal of geographical barriers, frequent biological invasions of introduced species become an urgent environmental problem.
Mota, Manuel   +2 more
core   +1 more source

Predators of the two paropsine leaf beetles Paropsisterna cloelia and Paropsis charybdis in eucalypt plantations in Marlborough, New Zealand Prädatoren der zwei Blattkäfer Paropsisterna cloelia and Paropsis charybdis in Eukalyptusplantagen in Marlborough, Neuseeland

open access: yesAgricultural and Forest Entomology, EarlyView.
Coccinellidae (Coleoptera), Miridae (Hemiptera), Hemerobiidae (Neuroptera), Pentatomidae (Hemiptera), Anystidae (Acari), Erythraeidae (Acari) and spiders (Araneidae, Oxyopidae and Salticidae) fed on the invasive paropsine leaf beetles in Marlborough, New Zealand.
Carolin Weser   +5 more
wiley   +1 more source

Polyethylene tarping elevates temperature and reduces emergence of Phloeosinus punctatus LeConte (Coleoptera: Curculionidae) from giant sequoia debris piles

open access: yesAgricultural and Forest Entomology, EarlyView.
Phloeosinus bark beetles may build up large populations in branch debris piles and stress giant sequoia trees. Covering debris piles with polyethylene sheeting increased the mean ambient temperature in piles and reduced beetle emergence. This was mediated by canopy structure, where ambient temperatures were further elevated under open canopies.
William R. Radecki, Thomas S. Davis
wiley   +1 more source

Laccaria fraterna (Cooke & Mass.: Sacc.) Pegler, 1965 (Agaricales, Basidiomycota) associated with exotic Eucalyptus sp. in northern Argentina and Paraguay [PDF]

open access: yes, 2017
Laccaria fraterna is recorded for the first time from the Cordillera Department, Paraguay and from the north of Argentina. Both macroscopic and microscopic morphological characteristics of the basidiomata are described.
Campi, Michelle   +3 more
core   +1 more source

Sanitation felling against the European spruce bark beetle: A matter of intensity and forest type Tagli fitosanitari contro il bostrico tipografo: una questione di intensità e tipologia forestale

open access: yesAgricultural and Forest Entomology, EarlyView.
We assess the effect of sanitation felling performed in 2022 in North‐Eastern Italy on bark beetle damage that occurred in 2023 across eight spruce forest types, as evaluated using multispectral satellite imagery. Bark beetle damage was reduced only at very high or very low sanitation felling rates.
Aurora Bozzini   +5 more
wiley   +1 more source

Обзор дикорастущих хвойных российских островов Финского залива

open access: yesTurczaninowia, 2018
На основе обширного гербарного материала по дикорастущим хвойным, собранного на российских островах Финского залива, и последующего морфолого-систематического изучения образцов впервые представлены данные о разнообразии и распространении в данном районе ...
L.V. Orlova, E.A. Glazkova
doaj  

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