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Keyword: germination

Life in interstitial space: Biocrusts inhibit exotic but not native plant establishment in semi-arid grasslands

Publications Posted on: August 17, 2020
Exotic plant species commonly exploit disturbances more successfully than native plants. This outcome is widely attributed to the fact that disturbance reduces biotic resistance from native plant competitors. However, biocrusts, communities of mosses, lichens, and micro‐organisms, are a prominent component of semi‐arid grasslands occurring in the interstitial spaces between vascular plants.

Germinability of true mountainmahogany achenes as influenced by soil and other environmental factors

Publications Posted on: January 29, 2020
Differences in percent germination, percent filled, and weights of true mountainmahogany achenes collected on four mountain soils were highly significant (p=.01). Germination, fill and weight were greater, also at the .01 level, for achenes from northwest aspects than for achenes from southwest aspects.

A review of precipitation and temperature control on seedling emergence and establishment for ponderosa and lodgepole pine forest regeneration

Publications Posted on: January 06, 2017
The persistence of ponderosa pine and lodgepole pine forests in the 21st century depends to a large extent on how seedling emergence and establishment are influenced by driving climate and environmental variables, which largely govern forest regeneration.

Evaluation of thermal, chemical, and mechanical seed scarification methods for 4 Great Basin lupine species

Publications Posted on: December 08, 2016
Seeds of most Great Basin lupine (Lupinus spp. [Fabaceae]) species are physically dormant and thus, difficult to establish in uniform stands in seed production fields. We designed this study to examine 5 seed scarification techniques, each with 11 levels of application (including a non-scarified control), to reduce the physical seed dormancy of longspur lupine (L. arbustus Douglas ex Lindl.), silvery lupine (L.

Effects of treatment and seed source on germination of eastern redcedar seed

Publications Posted on: May 12, 2016
Germination of eastern redcedar (Juniperus virginiana L.) seeds was best with a 96-hour soak in citric acid (10,000 ppm), with 6 weeks of moist-warm (24° C) stratification, and 10 weeks of moist-cold (5° C) stratification. Geographic seed sources responded differently to treatment.

Comparative germination of tree species on various kinds of surface soil material in the western white pine type

Publications Posted on: August 12, 2015
In formulating methods for effecting forest regeneration, considerable information is needed as to the germination habits of the species involved. Studies of germination habits have been made for several species in the western white pine type, but heretofore no sufficiently detailed investigation has been made covering the germination habits of all the principal tree species of this type.

Premature germination of forest tree seed during natural storage in duff

Publications Posted on: August 11, 2015
For some years forest investigators in the Pacific Northwest have been aware of the considerable quantity of tree seed which accumulates in the duff of heavy virgin timber stands and apparently retains its vitality for a few years in a sort of natural cold-storage condition.

Role of temperature and moisture in the survival and seedling physiology of a Great Basin perennial

Publications Posted on: October 03, 2014
Munro's globemallow (Sphaeralcea munroana) is an important constituent of Great Basin communities and is commonly used in restoration; however, little is known about the influence of environmental conditions on early plant establishment. The objective of this study was to evaluate the response of Munro's globemallow to a suite of temperature and moisture conditions directly following germination.

Hydrothermal assessment of temporal variability in seedbed microclimate

Publications Posted on: October 03, 2014
The microclimatic requirements for successful seedling establishment are much more restrictive than those required for adult plant survival. The purpose of the current study was to use hydrothermal germination models and a soil energy and water flux model to evaluate intra- and interannual variability in seedbed microclimate relative to potential germination response of six perennial grasses and cheatgrass.

Banking Wyoming big sagebrush seeds

Publications Posted on: June 21, 2013
Five commercially produced seed lots of Wyoming big sagebrush (Artemisia tridentata Nutt. var. wyomingensis (Beetle & Young) S.L. Welsh [Asteraceae]) were stored under various conditions for 5 y. Purity, moisture content as measured by equilibrium relative humidity, and storage temperature were all important factors to successful seed storage.