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THE ROLE OF CHILLING IN RELEASING OLIVE FLORAL BUDS FROM DORMANCY.

Author(s) : RALLO L., MARTIN G. C.

Type of article: Article

Summary

LEAFY EXPLANTS COLLECTED FROM 10 NOVEMBER TO 6 MARCH WERE GROWN IN A GREENHOUSE UNDER MIST AT 13/24 DEG C (NIGHT/DAY) AND IN A GROWTH CHAMBER AT 10/21 DEG C (NIGHT/DAY) TO DETERMINE THE END OF DORMANCY. GROWTH OF FLORAL BUDS FROM LEAFY EXPLANTS WAS FIRST RECORDED FROM 5 JANUARY SAMPLES. AFTER THAT DATE THE PERCENTAGE OF DEVELOPING FLORAL BUDS AND RATE OF THEIR DEVELOPMENT INCREASED. FLORAL BUD ABSCISSION, INCREASE IN BUD FRESH WEIGHT, AND SIMULTANEOUS DECREASE OF RELATIVE BUD DRY WEIGHT WERE ASSOCIATED WITH GROWTH INITIATION OF FLR D. LEAVES PLAY A CRITICAL ROLE IN DEVELOPMENT ONCE THE FLORAL BUDS HAD COMPLETED DORMANCY. SUPPLEMENTARY CHILLING OF ISOLATED SHOOTS COLLECTED 20 JANUARY DEMONSTRATED THAT 7.2 DEG C WAS SUFFICIENT TO COMPLETE CHILLING REQUIREMENTS, WHILE 12,5 DEG C ALLOWED BOTH THE COMPLETION OF CHILLING REQUIREMENTS AND THE PROPER TEMPERATURE FOR SUBSEQUENT FLORAL BUD GROWTH. WINTER CHILLING IS REQUIRED TO RELEASE FLORAL PREVIOUS CONCEPT THAT THE ROLE OF CHILLING IS TO INDUCE OLIVE FLORAL INITIATION.

Details

  • Original title: THE ROLE OF CHILLING IN RELEASING OLIVE FLORAL BUDS FROM DORMANCY.
  • Record ID : 1992-1163
  • Languages: English
  • Source: J. am. Soc. hortic. Sci. - vol. 116 - n. 6
  • Publication date: 1991/11
  • Document available for consultation in the library of the IIR headquarters only.

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