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Methods of Enhancing Germination of Anacua Seeds
Author
Fulbright, T. E.
Flenniken, K. S.
Waggerman, G. L.
Publisher
Society for Range Management
Publication Year
1986-09-01
Body

Seed dormancy hampers establishment of anacua [Ehretia anacua (Teran & Berl.) I.M. Johnst.] in plantings for wildlife. We evaluated methods of enhancing anacua germination and causes of dormancy. Seeds were (1) scarified with 2.9 mol liter-1 H2O2 or 0.71 mol liter-1 NaOCl for 10, 20, or 30 minutes, or concentrated (18.0 mol liter-1) H2SO4 for 15, 30, 60, or 120 minutes; (2) rinsed with water for 12, 24, 36, and 48 hours; (3) treated with 0.1, 1.4, 2.9, and 4.3 mmol liter-1 gibberellic acid (GA); (4) treated with 0.02 mol liter-1 KNO3; (5) treated with dry heat (130 degrees C) for 3, 6, 9, 12, and 15 minutes, (6) mechanically scarified; and (7) moist prechilled at 3 and 7 degrees C for 2 or 4 weeks. Seeds were germinated in controlled environment chambers at 30 degrees C. Germination was not enhanced by chemical scarification or rinsing. GA (1.4 mmol liter-1) increased germination from 35% for controls to 61%. Mechanical scarification and dry heat enhanced germination of highly dormant seeds only. A 2-week moist prechill at 3 degrees C increased germination of intact seeds from 6% for controls to 36%. Percent and rate of germination were similar among seed sources. Apparent afterripening requirements limited germination at 2 months after harvest to 3%. This requirement gradually broke down until at 8 months after harvest, germination had increased to 40%. Our results indicated that treatment with 1.4 mmol liter-1 GA or higher concentrations, moist prechilling for 2 weeks at 3 degrees C, and storage for 8 months will increase germination of dormant anacua seeds. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2307/3899449
Additional Information
Fulbright, T. E., Flenniken, K. S., & Waggerman, G. L. (1986). Methods of enhancing germination of anacua seeds. Journal of Range Management, 39(5), 450-453.
ISSN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/645366
Journal Volume
39
Journal Number
5
Journal Pages
450-453
Collection
Rangeland Ecology & Management (REM)
Journal Name
Journal of Range Management
Keywords
Texas
wildlife management
seed germination
seed dormancy
establishment
temperature
sulfuric acid
Boraginaceae
pretreatments
habitat improvement
ehretia anacua