Effects of constant and alternating temperatures on breaking dormancy of Peach (Prunus persica L.) seeds
The effects of constant stratification temperatures on breaking peach seed dormancy were evaluated using seed populations with various chilling requirements. Germination at 20"C increased steadily with stratification time. Sorne low chilling populations exhibited a broader temperature response...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Institut Agronomique et Vétérinaire Hassan II
1995-01-01
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| Series: | Revue Marocaine des Sciences Agronomiques et Vétérinaires |
| Online Access: | https://agrimaroc.org/index.php/Actes_IAVH2/article/view/217 |
| Summary: | The effects of constant stratification temperatures on breaking peach seed dormancy were evaluated using seed populations with various chilling requirements. Germination at 20"C increased steadily with stratification time. Sorne low chilling populations exhibited a broader temperature response curve, and a higher optimum temperature for stratification. The effects of alternating moderate and high temperatures were evaluated in comparison with continuous low temperatures. Intermittent exposure to 10"C promoted subsequent germination. Response to intermittent exposure to temperatures of15 to 25"C varied with seed type. Germination was consistently inhibited in high chill seeds by temperatures of 15"C or higher, whereas germination oflow chill seeds was either promoted or unaffected. Temperatures of 20 and 25"C consistently inhibited germination, regardless of seed source. Further experiments with high chill seeds demonstrated that exposure to high temperature was most effective in the late stages of chilling. Such temperatures may play an important role in chilling accumulation in areas with mild winters.
Key Words: Peach-Prunus persica-Seed-Chilling requirement-Temperature-Germination-Inhibition |
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| ISSN: | 2028-991X 2550-4401 |