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Cryotolerance of apple tree bud is independent of endodormancy.

Bilavcik A, Zamecnik J, Faltus M - Front Plant Sci (2015)

Bottom Line: The cryosurvival of vegetative apple buds of both cultivars correlated with their cold hardening without direct regard to their particular phase of dormancy.Both cultivars had the highest cryosurvival in December and January.The presented data were compared with our previous results from a dormancy study of in vitro apple culture.

View Article: PubMed Central - PubMed

Affiliation: Plant Physiology and Cryobiology Laboratory, Crop Research Institute Prague, Czech Republic.

ABSTRACT
Increasing interest in cryopreservation of dormant buds reveals the need for better understanding of the role of dormancy in cryotolerance. Dormancy stage and low-temperature survival of vegetative apple buds (Malus domestica Borkh.), cultivars 'Sampion' and 'Spartan', collected from orchard were evaluated during three seasons contrasting in temperature and precipitation throughout the arrested plant growth period. During each season, the cultivars differed either in the onset of the endodormancy or in the length of the endodormant period. A simple relation between endodormancy of the buds and their water content was not detected. The cryosurvival of vegetative apple buds of both cultivars correlated with their cold hardening without direct regard to their particular phase of dormancy. The period of the highest bud cryotolerance after low-temperature exposure overlapped with the endodormant period in some evaluated seasons. Both cultivars had the highest cryosurvival in December and January. The presented data were compared with our previous results from a dormancy study of in vitro apple culture. Endodormancy coincided with the period of successful cryosurvival of apple buds after liquid nitrogen exposure, but as such, it was not decisive for their survival and did not limit their successful cryopreservation.

No MeSH data available.


Related in: MedlinePlus

Scheme of endodormancy of vegetative buds of apple cultivars ‘Sampion’ and ‘Spartan’ in the seasons of 1998/1999, 1999/2000, and 2000/2001. The length of arrows corresponds to the length of endodormancy. The question mark indicates unknown length of endodormancy in the season of 1999/2000.
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Figure 3: Scheme of endodormancy of vegetative buds of apple cultivars ‘Sampion’ and ‘Spartan’ in the seasons of 1998/1999, 1999/2000, and 2000/2001. The length of arrows corresponds to the length of endodormancy. The question mark indicates unknown length of endodormancy in the season of 1999/2000.

Mentions: There were differences in the length of endodormancy among seasons, differences in time of entering and release from endodormancy among seasons, and the cultivars differed also in one season to each other (Figure 3). The three evaluated seasons differed in their temperature and precipitation conditions important for inducing dormancy (Table 1). The exact course of the temperature and precipitation is shown in Figure 1.


Cryotolerance of apple tree bud is independent of endodormancy.

Bilavcik A, Zamecnik J, Faltus M - Front Plant Sci (2015)

Scheme of endodormancy of vegetative buds of apple cultivars ‘Sampion’ and ‘Spartan’ in the seasons of 1998/1999, 1999/2000, and 2000/2001. The length of arrows corresponds to the length of endodormancy. The question mark indicates unknown length of endodormancy in the season of 1999/2000.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4561819&req=5

Figure 3: Scheme of endodormancy of vegetative buds of apple cultivars ‘Sampion’ and ‘Spartan’ in the seasons of 1998/1999, 1999/2000, and 2000/2001. The length of arrows corresponds to the length of endodormancy. The question mark indicates unknown length of endodormancy in the season of 1999/2000.
Mentions: There were differences in the length of endodormancy among seasons, differences in time of entering and release from endodormancy among seasons, and the cultivars differed also in one season to each other (Figure 3). The three evaluated seasons differed in their temperature and precipitation conditions important for inducing dormancy (Table 1). The exact course of the temperature and precipitation is shown in Figure 1.

Bottom Line: The cryosurvival of vegetative apple buds of both cultivars correlated with their cold hardening without direct regard to their particular phase of dormancy.Both cultivars had the highest cryosurvival in December and January.The presented data were compared with our previous results from a dormancy study of in vitro apple culture.

View Article: PubMed Central - PubMed

Affiliation: Plant Physiology and Cryobiology Laboratory, Crop Research Institute Prague, Czech Republic.

ABSTRACT
Increasing interest in cryopreservation of dormant buds reveals the need for better understanding of the role of dormancy in cryotolerance. Dormancy stage and low-temperature survival of vegetative apple buds (Malus domestica Borkh.), cultivars 'Sampion' and 'Spartan', collected from orchard were evaluated during three seasons contrasting in temperature and precipitation throughout the arrested plant growth period. During each season, the cultivars differed either in the onset of the endodormancy or in the length of the endodormant period. A simple relation between endodormancy of the buds and their water content was not detected. The cryosurvival of vegetative apple buds of both cultivars correlated with their cold hardening without direct regard to their particular phase of dormancy. The period of the highest bud cryotolerance after low-temperature exposure overlapped with the endodormant period in some evaluated seasons. Both cultivars had the highest cryosurvival in December and January. The presented data were compared with our previous results from a dormancy study of in vitro apple culture. Endodormancy coincided with the period of successful cryosurvival of apple buds after liquid nitrogen exposure, but as such, it was not decisive for their survival and did not limit their successful cryopreservation.

No MeSH data available.


Related in: MedlinePlus