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Aspergillus niger, the causal agent of black mould disease in date fruits, infects and colonizes flowers and young fruitlets
Year:
2021
Source of publication :
Plant Pathology
Authors :
בורנשטיין, מנחם
;
.
בלאוסוב, אדוארד
;
.
כהן, יובל
;
.
עזרא, דוד
;
.
צמח, חניתה
;
.
שולחני, רן
;
.
שטיינברג, דני
;
.
Volume :
Co-Authors:

Yuval Cohen  

Ran Shulhani  

Yehuda Rot  

Hanita Zemach  

Eduard Belausov  

Maayan Grinberg‐Baran  

Menachem Borenstein  

Shimon Pivonia  

David Ezra  

Dani Shtienberg

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Black mould, caused by Aspergillus niger, is the main fungal disease affecting date fruits. Symptoms develop inside the fruit, at the inner space between the pulp and the seed. This study focuses on the aetiology of black mould disease in Medjoul fruit. We followed symptom appearance naturally and after artificial Aniger inoculation at different development and maturity stages. Symptoms developed in only a short period during early fruit ripening. However, fruits were commonly colonized at earlier stages of development. Artificial inoculation of flowers and setting fruitlets increased the level of fruit colonization, while fungicide spraying at these stages decreased colonization. Several weeks following flower inoculation by Aniger, mycelium could be detected on degenerating stigmas and carpels as well as between the fruit and the calyx. Following inoculation with an Aniger strain expressing green fluorescent protein (AnigerGFP), the pathogen was detected on stigmas of setting fruitlets but not within the stigmatic tissue or the transmitting tract of the carpel. The AnigerGFP strain was detected during fruit development below the base of the large fruitlets and above the calyx surrounding the vascular bundle leading into the fruit. The results suggest that Aniger can infect and colonize flowers and setting fruitlets, grows on the degenerating carpels, and remains latent at a protected site at the base of the fruit until ripening. It then induces the typical black mould symptoms. The significance of these results for developing means to cope with the disease is discussed.

Note:
Related Files :
Aspergillus niger
colonization
disease aetiology
GFP
Phoenix dactylifera
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/ppa.13358
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
54157
Last updated date:
02/03/2022 17:27
Creation date:
15/03/2021 13:14
Scientific Publication
Aspergillus niger, the causal agent of black mould disease in date fruits, infects and colonizes flowers and young fruitlets

Yuval Cohen  

Ran Shulhani  

Yehuda Rot  

Hanita Zemach  

Eduard Belausov  

Maayan Grinberg‐Baran  

Menachem Borenstein  

Shimon Pivonia  

David Ezra  

Dani Shtienberg

Aspergillus niger, the causal agent of black mould disease in date fruits, infects and colonizes flowers and young fruitlets

Black mould, caused by Aspergillus niger, is the main fungal disease affecting date fruits. Symptoms develop inside the fruit, at the inner space between the pulp and the seed. This study focuses on the aetiology of black mould disease in Medjoul fruit. We followed symptom appearance naturally and after artificial Aniger inoculation at different development and maturity stages. Symptoms developed in only a short period during early fruit ripening. However, fruits were commonly colonized at earlier stages of development. Artificial inoculation of flowers and setting fruitlets increased the level of fruit colonization, while fungicide spraying at these stages decreased colonization. Several weeks following flower inoculation by Aniger, mycelium could be detected on degenerating stigmas and carpels as well as between the fruit and the calyx. Following inoculation with an Aniger strain expressing green fluorescent protein (AnigerGFP), the pathogen was detected on stigmas of setting fruitlets but not within the stigmatic tissue or the transmitting tract of the carpel. The AnigerGFP strain was detected during fruit development below the base of the large fruitlets and above the calyx surrounding the vascular bundle leading into the fruit. The results suggest that Aniger can infect and colonize flowers and setting fruitlets, grows on the degenerating carpels, and remains latent at a protected site at the base of the fruit until ripening. It then induces the typical black mould symptoms. The significance of these results for developing means to cope with the disease is discussed.

Scientific Publication
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