Sleeper Occurrence after Chilling in Relation to Depth of Dormancy and Bulb Storage in Easter Lily Bulbs.
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Accession number;99A0922073
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| Title;Sleeper Occurrence after Chilling in Relation to Depth of Dormancy and Bulb Storage in Easter Lily Bulbs. |
| Author;
IMANISHI HIDEO
(Univ. of Osaka Prefect., Coll. of Agric.)
SHIMADA YUKIKO
(Univ. of Osaka Prefect., Coll. of Agric.)
YOSHIYAMA YUGO
(Univ. of Osaka Prefect., Coll. of Agric.)
OKAYAMA KENJI
(Univ. of Osaka Prefect., Coll. of Agric.)
MORI GENJIRO
(Univ. of Osaka Prefect., Coll. of Agric.)
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Journal Title;Journal of the Japanese Society for Horticultural Science
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Journal Code:F0626A
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ISSN:0013-7626
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VOL.66;NO.1;PAGE.157-162(1997)
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| Figure&Table&Reference;FIG.2, TBL.3, REF.9 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The present experiments were carried out to determine the relationship between depth of dormancy and sleeper occurrence after chilling, and also to know factors involved in sleeper occurrence, using 'Hinomoto'. Bulbs, 19 to 22cm in circumference were planted at different times of the season and sprouted at 10, 15, 20, and 25.DEG.C. to determine the depth of dormancy. To determine sleeper occurrence, bulbs were vernalized at 9.DEG.C. for 6 weeks at different intervals after harvest and allowed to sprout at prevailing summer temperatures (20 to 30.DEG.C.) or at 25.DEG.C.. Bulbs which were planted later in the season sprouted at a higher percentage frequency and quicker at 15.DEG.C. and 20.DEG.C.. This sprouting pattern indicated that the depth of dormancy decreased with increasing storage period at room temperature after harvest. A high percentage of bulbs sprouted if chilled immediately after harvest. The sprouting percentage decreased markedly when bulbs were chilled after dry storage at room temperature for 1 to 3 weeks. When the chilling was delayed, the sprouting percentage improved. Most bulbs that were stored dry at 20 to 30.DEG.C. for 2 weeks and then chilled, did not sprout and became sleeper; bulbs vernalized without dry storage had a high sprouting percentage. Soaking bulbs in 47-48.DEG.C. water for 1 hour immediately after harvest accerelated sprouting at 20.DEG.C.; dry stored, chilled bulbs also had a high sprouting percentage following the hot water treatment. These results indicate that there is no relationship between depth of dormancy and sleeper occurrence and that dry storage of bulbs at 20 to 30.DEG.C. for 1 to 3 weeks after harvest in June induced occurrence of sleepers after subjecting to chilling. (author abst.) |
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