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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

Period of endodormancy of vegetative buds of apple cultivars ‘Sampion’ (A) and ‘Spartan’ (B) in the seasons of 1998/1999, 1999/2000, and 2000/2001. Endodormancy was assessed when less than 50% of buds did not regrow after 30 days in growth inductive conditions. Bars indicate SD (p < 0.05). Note: Different beginning and the end of endodormancy. The length of arrows corresponds to the length of endodormancy (in days). The question mark indicates unknown length of endodormancy in the season 1999/2000.
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Figure 2: Period of endodormancy of vegetative buds of apple cultivars ‘Sampion’ (A) and ‘Spartan’ (B) in the seasons of 1998/1999, 1999/2000, and 2000/2001. Endodormancy was assessed when less than 50% of buds did not regrow after 30 days in growth inductive conditions. Bars indicate SD (p < 0.05). Note: Different beginning and the end of endodormancy. The length of arrows corresponds to the length of endodormancy (in days). The question mark indicates unknown length of endodormancy in the season 1999/2000.

Mentions: The period of endodormancy of apple cultivar ‘Sampion’ and ‘Spartan’ in winter season of 1998/1999 was from October 19, 1998 to December 7, 1998 (49 days) and from October 12, 1998 to January 11, 1999 (91 days), respectively. In winter season of 1999/2000, the entering in endodormancy was not measured. The release of endodormancy of both apple cultivars ‘Sampion’ and ‘Spartan’ in winter season of 1999/2000 was October 6, 1999. The period of endodormancy of apple cultivar ‘Sampion’ and ‘Spartan’ in winter season of 2000/2001 was from November 28, 2000 to January 3, 2001 (37 days) and from November 22, 2000 to January 22, 2001 (61 days), respectively. The time course of endodormancy of apple cultivar ‘Sampion’ and ‘Spartan’ in winter seasons of 1998/1999, 1999/2000, and 2000/2001 is shown in Figure 2.


Cryotolerance of apple tree bud is independent of endodormancy.

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

Period of endodormancy of vegetative buds of apple cultivars ‘Sampion’ (A) and ‘Spartan’ (B) in the seasons of 1998/1999, 1999/2000, and 2000/2001. Endodormancy was assessed when less than 50% of buds did not regrow after 30 days in growth inductive conditions. Bars indicate SD (p < 0.05). Note: Different beginning and the end of endodormancy. The length of arrows corresponds to the length of endodormancy (in days). The question mark indicates unknown length of endodormancy in the season 1999/2000.
© Copyright Policy
Related In: Results  -  Collection

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

Figure 2: Period of endodormancy of vegetative buds of apple cultivars ‘Sampion’ (A) and ‘Spartan’ (B) in the seasons of 1998/1999, 1999/2000, and 2000/2001. Endodormancy was assessed when less than 50% of buds did not regrow after 30 days in growth inductive conditions. Bars indicate SD (p < 0.05). Note: Different beginning and the end of endodormancy. The length of arrows corresponds to the length of endodormancy (in days). The question mark indicates unknown length of endodormancy in the season 1999/2000.
Mentions: The period of endodormancy of apple cultivar ‘Sampion’ and ‘Spartan’ in winter season of 1998/1999 was from October 19, 1998 to December 7, 1998 (49 days) and from October 12, 1998 to January 11, 1999 (91 days), respectively. In winter season of 1999/2000, the entering in endodormancy was not measured. The release of endodormancy of both apple cultivars ‘Sampion’ and ‘Spartan’ in winter season of 1999/2000 was October 6, 1999. The period of endodormancy of apple cultivar ‘Sampion’ and ‘Spartan’ in winter season of 2000/2001 was from November 28, 2000 to January 3, 2001 (37 days) and from November 22, 2000 to January 22, 2001 (61 days), respectively. The time course of endodormancy of apple cultivar ‘Sampion’ and ‘Spartan’ in winter seasons of 1998/1999, 1999/2000, and 2000/2001 is shown in Figure 2.

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