Influence of salinity and temperature on the germination of Kochia scoparia

Kochia scoparia is one of the most common annual halophytes foundin the Great Basin. Seeds were collected from a population growing in asalt playa at Faust, Utah and were germinated at 5 temperature regimes(12 h night/12 h day, 5-15 ^sup °^C, 10-20 ^sup °^C, 15-25 ^sup °^C,20-30 ^sup °^C and 25-35 ^...

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Bibliographic Details
Published in:Wetlands ecology and management 2001-12, Vol.9 (6), p.483-489
Main Authors: Khan, M Ajmal, Gul, Bilquees, Weber, Darrell J
Format: Article
Language:English
Subjects:
Distilled water
Kochia scoparia
Salinity
Sodium chloride
USA, Great Basin
USA, Utah, Faust
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Summary:Kochia scoparia is one of the most common annual halophytes foundin the Great Basin. Seeds were collected from a population growing in asalt playa at Faust, Utah and were germinated at 5 temperature regimes(12 h night/12 h day, 5-15 ^sup °^C, 10-20 ^sup °^C, 15-25 ^sup °^C,20-30 ^sup °^C and 25-35 ^sup °^C) and 6 salinities (0, 200, 400,600, 800 and 1000 mM NaCl) to determine optimal conditions forgermination and recovery of germination from saline conditions after beingtransferred to distilled water. Maximum germination occurred in distilledwater, and an increase in NaCl concentration progressively inhibited seedgermination. Few seeds germinated at 1000 mM NaCl. A temperatureregime of 25 ^sup °^C night and 35 ^sup °^C day yielded maximumgermination. Cooler temperature 5-15 ^sup °^C significantly inhibited seedgermination. Rate of germination decreased with increase in salinity.Germination rate was highest at 25-35 ^sup °^C and lowest at5-15 ^sup °^C. Seeds were transferred from salt solutions to distilled waterafter 20 days and those from high salinities recovered quickly at warmertemperature regimes. Final recovery germination percentages in high salttreatments were high, indicating that exposure to high concentration ofNaCl did not inhibit germination permanently.[PUBLICATION ABSTRACT]
ISSN:0923-4861
1572-9834
DOI:10.1023/A:1012232728565