Some mechanisms of winter resistance in apricot flower buds in the period of ecodormancy
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Kuupäev
2021
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Ajakirja pealkiri
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Kirjastaja
Abstrakt
The accelerated development of flower buds during the thaw in apricots and almonds
during the ecodormancy period leads to significant damage to the flower elements during return
frosts and loss of future crops. The aim of the research was to identify the mechanisms of delay
in the rate of development of flower buds during the ecodormancy period, their relationship with
the degree of frost resistance and the timing of flowering in apricots. The following indicators of
flower buds were analyzed: the degree of exit from endodormancy, frost resistance at
temperatures of -18 °C and -31 °C, the degree of morphological development of flower elements,
the activity of α-amylases at temperatures of + 15 °C and + 60 °C, total content water,
phenolcarboxylic acids, flavonoids and free proline. A significant positive correlation was
revealed between the percentage of death of flower buds at a temperature of -18 °C and the
percentage of buds emerging from endogenous dormancy (0.64*), the percentage of death of buds
at a temperature of -31 °C and the degree of development of flower elements (0.70*), water
content and the degree of development of flower elements (0.76**), amylase activity at +60 °C
and amylase activity at +15 °C (0.76**), the content of phenolcarboxylic acids in the bark of
shoots and flower buds (0.61*). For the first time, psychrophilic forms of α-amylases have been
discovered in apricot flower buds.
Kirjeldus
Received: March 27th, 2021 ; Accepted: July 6th, 2021 ; Published: August 30th, 2021 ; Correspondence: biotechnoalgol@mail.ru
Märksõnad
frost resistance of flower buds, psychrophilic α-amylase, thermal stability of α-amylases, α-amylase inhibitors, phenolic compounds, articles