Heterogeneity of dormancy in apple embryos. [Pyrus malus]

Conference · Tue Apr 01 04:00:00 EST 1986 · Plant Physiol., Suppl.; (United States)

OSTI ID:5273185

Christine, B; Camille, B

This study concerns the heterogeneity of embryo dormancy with the aim of investigating a possible relationship between chlorophyllogenesis and dormancy. Dormant embryos of Pyrus malus L. cv. Golden delicious were cultivated on water-agar (agar 6 g/l). They were placed flat with one cotyledon in contact with the medium. After 6 days of culture at 23/sup 0/C under fluorescent light the non-germinated embryos (99% of the total) were classified in three main categories on the basis of the state of greening of their cotyledons. By application of partial dormancy releasing treatments (chilling, anaerobiosis, GA/sub 7/), it was shown that the three categories of embryos were characterized by different depths of dormancy. Germination was most difficult for the embryos which were non pigmented after the initial culture, whereas high germination percentages were rapidly reached by embryos exhibiting high degree of greening. Evaluation of ABA by radioimmunoassay shows that the three categories of embryos also differ in their ABA and ABA-GE levels. A good correlation was thus observed between depth of dormancy and levels of ABA and ABA-GE.

• Research Organization: Universite de Nice, France
• OSTI ID: 5273185
• Conference Information: Journal Name: Plant Physiol., Suppl.; (United States) Journal Volume: 80:4
• Country of Publication: United States
• Language: English

Related Subjects

550200* -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
APPLES
FOOD
FRUITS
GERMINATION
LATENCY PERIOD
PIGMENTS
SEEDS