Influence of Afterripening Temperature and Endogenous Rhythms on Downy Brome (Bromus tectorum) Germination

Afterripening requirements and the possible occurrence of endogenously controlled germination rhythms in downy brome (Bromus tectorum L.) were investigated in the laboratory. Afterripening temperatures from 0 to 50 C, maintained for periods of 4 to 28 days, had little effect on the percentage and ra...

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Veröffentlicht in:	Weed science 1980-05, Vol.28 (3), p.321-323
Hauptverfasser:	Thill, D. C., Schirman, R. D., Appleby, A. P.
Format:	Artikel
Sprache:	eng
Schlagworte:	After ripening Crop harvesting Dormancy Germination High temperature Postharvest handling Ripening Seeds Test ranges
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container_title	Weed science
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creator	Thill, D. C. Schirman, R. D. Appleby, A. P.
description	Afterripening requirements and the possible occurrence of endogenously controlled germination rhythms in downy brome (Bromus tectorum L.) were investigated in the laboratory. Afterripening temperatures from 0 to 50 C, maintained for periods of 4 to 28 days, had little effect on the percentage and rate of downy brome germination when seeds were incubated at 15 and 20 C. However, at 30 C germination temperature, the percentage and rate of germination were significantly increased by short periods (4 to 7 days) of afterripening at 50 C. Similar results occurred at 20 to 40 C afterripening temperatures after 14 to 28 days exposure. In general, high temperature afterripening conditions (40 to 50 C) initially increased downy brome germination at 30 C incubation temperature, but prolonged exposure tended to decrease germination. No endogenously controlled germination rhythms were observed in downy brome caryopses.
doi_str_mv	10.1017/S0043174500055375
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C. ; Schirman, R. D. ; Appleby, A. P.</creator><creatorcontrib>Thill, D. C. ; Schirman, R. D. ; Appleby, A. P.</creatorcontrib><description>Afterripening requirements and the possible occurrence of endogenously controlled germination rhythms in downy brome (Bromus tectorum L.) were investigated in the laboratory. Afterripening temperatures from 0 to 50 C, maintained for periods of 4 to 28 days, had little effect on the percentage and rate of downy brome germination when seeds were incubated at 15 and 20 C. However, at 30 C germination temperature, the percentage and rate of germination were significantly increased by short periods (4 to 7 days) of afterripening at 50 C. Similar results occurred at 20 to 40 C afterripening temperatures after 14 to 28 days exposure. In general, high temperature afterripening conditions (40 to 50 C) initially increased downy brome germination at 30 C incubation temperature, but prolonged exposure tended to decrease germination. 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C.</creatorcontrib><creatorcontrib>Schirman, R. D.</creatorcontrib><creatorcontrib>Appleby, A. P.</creatorcontrib><title>Influence of Afterripening Temperature and Endogenous Rhythms on Downy Brome (Bromus tectorum) Germination</title><title>Weed science</title><addtitle>Weed sci</addtitle><description>Afterripening requirements and the possible occurrence of endogenously controlled germination rhythms in downy brome (Bromus tectorum L.) were investigated in the laboratory. Afterripening temperatures from 0 to 50 C, maintained for periods of 4 to 28 days, had little effect on the percentage and rate of downy brome germination when seeds were incubated at 15 and 20 C. However, at 30 C germination temperature, the percentage and rate of germination were significantly increased by short periods (4 to 7 days) of afterripening at 50 C. Similar results occurred at 20 to 40 C afterripening temperatures after 14 to 28 days exposure. In general, high temperature afterripening conditions (40 to 50 C) initially increased downy brome germination at 30 C incubation temperature, but prolonged exposure tended to decrease germination. No endogenously controlled germination rhythms were observed in downy brome caryopses.</description><subject>After ripening</subject><subject>Crop harvesting</subject><subject>Dormancy</subject><subject>Germination</subject><subject>High temperature</subject><subject>Postharvest handling</subject><subject>Ripening</subject><subject>Seeds</subject><subject>Test ranges</subject><issn>0043-1745</issn><issn>1550-2759</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1980</creationdate><recordtype>article</recordtype><recordid>eNp9kEFLw0AQhRdRsFZ_gCCyRz1EZ7vZJHustWqhINj2HDbJbJrQ7JbdBOm_N6HFi-BpDt9782YeIbcMnhiw-HkFEHIWhwIAhOCxOCMjJgQEk1jIczIacDDwS3LlfQ3AogmTI1IvjN51aHKkVtOpbtG5ao-mMiVdY7NHp9rOIVWmoHNT2BKN7Tz92h7abeOpNfTVfpsDfXG2QfowjB63mLfWdc0jfUfXVEa1lTXX5EKrnceb0xyTzdt8PfsIlp_vi9l0GeQsTsIggphHvFASCq6Ra5EkKpMYFcC15LGMkl6ltSqAKeRS8oxFWZbAJNSsSBLJx4Qd9-bOeu9Qp3tXNcodUgbpUFb6p6zec3f01L4__NcQ9joehT2-P2KtbKpKV_l0s2IyYRDFAsIhk58yVZO5qigxrW3nTP_nP6k_Alh-6w</recordid><startdate>19800501</startdate><enddate>19800501</enddate><creator>Thill, D. 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P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1784-607363da90d3fe3f588ab9e6d03f937968784ffad01ae3993b16bb8024f1d8893</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1980</creationdate><topic>After ripening</topic><topic>Crop harvesting</topic><topic>Dormancy</topic><topic>Germination</topic><topic>High temperature</topic><topic>Postharvest handling</topic><topic>Ripening</topic><topic>Seeds</topic><topic>Test ranges</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Thill, D. C.</creatorcontrib><creatorcontrib>Schirman, R. D.</creatorcontrib><creatorcontrib>Appleby, A. P.</creatorcontrib><collection>AGRIS</collection><collection>CrossRef</collection><jtitle>Weed science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Thill, D. C.</au><au>Schirman, R. 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However, at 30 C germination temperature, the percentage and rate of germination were significantly increased by short periods (4 to 7 days) of afterripening at 50 C. Similar results occurred at 20 to 40 C afterripening temperatures after 14 to 28 days exposure. In general, high temperature afterripening conditions (40 to 50 C) initially increased downy brome germination at 30 C incubation temperature, but prolonged exposure tended to decrease germination. No endogenously controlled germination rhythms were observed in downy brome caryopses.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S0043174500055375</doi><tpages>3</tpages></addata></record>
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subjects	After ripening Crop harvesting Dormancy Germination High temperature Postharvest handling Ripening Seeds Test ranges
title	Influence of Afterripening Temperature and Endogenous Rhythms on Downy Brome (Bromus tectorum) Germination
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