Habitat, Seed Dormancy, and Allozyme Variation of the Rare Endemic Phacelia cookei (Boraginaceae)

Autor:	M. E. Patterson, C. T. Ivey, A. L. Edwards, K. A. Schierenbeck, T. Forbis De Queiroz, J. K. Nelson
Rok vydání:	2013
Předmět:	education.field_of_study Stratification (seeds) Habitat Germination Botany Population Seed dormancy Boraginaceae Biology Endemism education biology.organism_classification Scarification
Zdroj:	Madroño. 60:11-23
ISSN:	1943-6297 0024-9637
Popis:	We conducted habitat, germination, and population genetic studies to inform management priorities for Phacelia cookei Constance & Heckard (Boraginaceae), a diminutive annual herb known from only four populations near Mt. Shasta in Siskiyou Co., California. Habitat surveys characterized soil, vegetation, and ground cover of extant populations and attempted to identify potentially suitable, but uncolonized, habitat. We were unable to distinguish any sites based on tests of soil characteristics. Nama densum Lemmon occurred at all sites where P. cookei was present. We identified several areas near existing populations that appeared to be suitable, but uncolonized, habitat. We tested the effects of various factorial combinations of after-ripening, scarification, stratification, and variable germination temperatures on breaking seed dormancy. Seed viability by tetrazolium tests ranged between 89% and 93%, but the highest germination from any treatment combination was 14% after adjusting for seed viabil...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fded080438b41a22ec1a8d1299c0f0bf https://doi.org/10.3120/0024-9637-60.1.11 Zobrazit plný text záznamu