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|a 10.1093/jxb/erae305
|2 doi
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|a pubmed25n1249.xml
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|a (DE-627)NLM374996105
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|a (NLM)39011888
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Pochamreddy, Madhuri
|e verfasserin
|4 aut
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|a Alternate bearing in 'Hass' avocado
|b fruit load-induced changes in bud auxin homeostasis are associated with flowering repression
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 27.09.2024
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|a Date Revised 27.09.2024
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprintsoup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
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|a In 'Hass' avocado (Persea americana), fruit presence reduces next season flowering. Recent fruit tree studies proposed that heavy fruit load (HFL) generates an auxin (indole-3-acetic acid, IAA) signal in the buds that represses flowering. However, the nature of this signal remains unknown. Here, we investigated the effect of avocado HFL on bud IAA accumulation and flowering transition. We found that IAA-aspartate and IAA-glutamate conjugate levels were significantly higher in buds from fully loaded ('on') than low-loaded ('off') trees, hinting that free IAA levels were higher in the former. Expression analysis showed that coinciding with flowering reduction, HFL induced the floral repressor PaTFL1, and suggested that accumulation of IAA in buds as imposed by HFL was associated with its conjugation to aspartate and glutamate and resulted both from de novo IAA synthesis and from reduced IAA export. Accordingly, experiments involving radiolabelled [14C]IAA demonstrated that HFL reduced shoot basipetal IAA transport. Finally, we confirmed the negative effects of IAA on flowering, showing that IAA and polar auxin transport blocker (2,3,5-triiodobenzoic acid) treatments delayed 'off' trees' inflorescence development, reducing their inflorescence axis and inducing PaTFL1 expression. Together, our data indicate that avocado HFL generates IAA signalling in buds that induces PaTFL1, leading to repression of inflorescence development
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|a Journal Article
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|a TERMINAL FLOWER 1 (TFL1)
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|a Alternate bearing
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|a auxin
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|a avocado (Persea americana) flowering
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|a fruit load
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|a polar auxin transport
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| 650 |
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|a Indoleacetic Acids
|2 NLM
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| 650 |
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|a Plant Proteins
|2 NLM
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| 650 |
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|a indoleacetic acid
|2 NLM
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| 650 |
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|a 6U1S09C61L
|2 NLM
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| 700 |
1 |
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|a Haim, Dor
|e verfasserin
|4 aut
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|a Halon, Eyal
|e verfasserin
|4 aut
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1 |
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|a Keinan, Eti
|e verfasserin
|4 aut
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| 700 |
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|a Rai, Avinash Chandra
|e verfasserin
|4 aut
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| 700 |
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|a Kamara, Itzhak
|e verfasserin
|4 aut
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| 700 |
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|a Sadka, Avi
|e verfasserin
|4 aut
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|a Irihimovitch, Vered
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 75(2024), 18 vom: 27. Sept., Seite 5717-5733
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnas
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| 773 |
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|g volume:75
|g year:2024
|g number:18
|g day:27
|g month:09
|g pages:5717-5733
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| 856 |
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|u http://dx.doi.org/10.1093/jxb/erae305
|3 Volltext
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|d 75
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|h 5717-5733
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