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פותח על ידי קלירמאש פתרונות בע"מ -
Low overnight temperatures delay ‘Hass’ avocado (Persea americana) female flower opening, leading to nocturnal flowering
Year:
2018
Source of publication :
Journal of Pollination Ecology
Authors :
דג, ארנון
;
.
Volume :
23
Co-Authors:

David Errol Pattemore, Max N. Buxton, Brian T. Cutting, Heather M. McBrydie, Robert Mark Goodwin

Facilitators :
From page:
127
To page:
135
(
Total pages:
9
)
Abstract:

Avocado (Persea americana) has synchronously protogynous flowers: flowers open first in female phase before closing and opening the next day in male phase. Cultivars are grouped based on whether the flowers typically first open in female phase in the morning (type A), or in the afternoon (type B). However, it is known that environmental factors can alter the timing of flower opening, with cold temperatures being shown to affect the timing of flowering. The aim of this study was to investigate how low spring temperatures in New Zealand affect the flowering cycle of commercial avocado cultivars, focusing primarily on the receptive female phase of ‘Hass’, a type A cultivar. Time-lapse photography was used to assess flower opening times of ‘Hass’ over three years. Decreasing minimum overnight temperatures were associated with a delay in the timing of ‘Hass’ female flower phases and resulted in nocturnal flowering of both male and female phase flowers.  We recorded insects visiting female flowers at night, and some nocturnal flower visitors collected were carrying avocado pollen. Our study suggests that nocturnal pollination needs to be considered for avocados grown in temperate regions. Furthermore, as the timing of the female phase of ‘Hass’ varied significantly with overnight temperature, the activity patterns of potential pollinators need to be considered to ensure adequate pollinator activity across the range of times in which ‘Hass’ flowers are receptive.

Note:
Related Files :
Avocado
bees
FLIES
floral biology
HASS
Honeybees
Persea americana
Phenology
plant biology
Pollinators
temperature
עוד תגיות
תוכן קשור
More details
DOI :
http://dx.doi.org/10.26786/1920-7603%282018%2912
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
44487
Last updated date:
02/03/2022 17:27
Creation date:
30/10/2019 11:34
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Scientific Publication
Low overnight temperatures delay ‘Hass’ avocado (Persea americana) female flower opening, leading to nocturnal flowering
23

David Errol Pattemore, Max N. Buxton, Brian T. Cutting, Heather M. McBrydie, Robert Mark Goodwin

Low overnight temperatures delay ‘Hass’ avocado (Persea americana) female flower opening, leading to nocturnal flowering

Avocado (Persea americana) has synchronously protogynous flowers: flowers open first in female phase before closing and opening the next day in male phase. Cultivars are grouped based on whether the flowers typically first open in female phase in the morning (type A), or in the afternoon (type B). However, it is known that environmental factors can alter the timing of flower opening, with cold temperatures being shown to affect the timing of flowering. The aim of this study was to investigate how low spring temperatures in New Zealand affect the flowering cycle of commercial avocado cultivars, focusing primarily on the receptive female phase of ‘Hass’, a type A cultivar. Time-lapse photography was used to assess flower opening times of ‘Hass’ over three years. Decreasing minimum overnight temperatures were associated with a delay in the timing of ‘Hass’ female flower phases and resulted in nocturnal flowering of both male and female phase flowers.  We recorded insects visiting female flowers at night, and some nocturnal flower visitors collected were carrying avocado pollen. Our study suggests that nocturnal pollination needs to be considered for avocados grown in temperate regions. Furthermore, as the timing of the female phase of ‘Hass’ varied significantly with overnight temperature, the activity patterns of potential pollinators need to be considered to ensure adequate pollinator activity across the range of times in which ‘Hass’ flowers are receptive.

Scientific Publication
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