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Petal abscission in fragrant roses is associated with large scale diferential regulation of the abscission zone transcriptome

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Title Petal abscission in fragrant roses is associated with large scale diferential regulation of the abscission zone transcriptome
 
Creator Singh, Priya
Bharti, Neeraj
Singh, Amar Pal
Tripathi, Siddharth Kaushal
Pandey, Saurabh Prakash
Chauhan, Abhishek Singh
Kulkarni, Abhijeet
Sane, Aniruddha P.
 
Subject Petal abscission in fragrant roses
abscission zone transcriptome
 
Description Accepted date: 08 September 2020
Flowers of fragrant roses such as Rosa bourboniana are ethylene-sensitive and undergo rapid petal
abscission while hybrid roses show reduced ethylene sensitivity and delayed abscission. To understand
the molecular mechanism underlying these diferences, a comparative transcriptome of petal
abscission zones (AZ) of 0 h and 8 h ethylene-treated fowers from R. bourboniana was performed.
Diferential regulation of 3700 genes (1518 up, 2182 down) representing 8.5% of the AZ transcriptome
was observed between 0 and 8 h ethylene-treated R. bourboniana petal AZ. Abscission was associated
with large scale up-regulation of the ethylene pathway but prominent suppression of the JA, auxin
and light-regulated pathways. Regulatory genes encoding kinases/phosphatases/F-box proteins
and transcription factors formed the major group undergoing diferential regulation besides genes
for transporters, wall modifcation, defense and phenylpropanoid pathways. Further comparisons
with ethylene-treated petals of R. bourboniana and 8 h ethylene-treated AZ (R. hybrida) identifed
a core set of 255 genes uniquely regulated by ethylene in R. bourboniana AZ. Almost 23% of these
encoded regulatory proteins largely conserved with Arabidopsis AZ components. Most of these were
up-regulated while an entire set of photosystem genes was prominently down-regulated. The studies
provide important information on regulation of petal abscission in roses.
We are grateful to the Council of Scientifc and Industrial Research, India for funding the work under the project
BSC107 and for Junior and Senior Research Fellowships to PS, SKT, AP Singh, SPP and ASC. We thank Mr Ram Awadh for taking care of the rose plants.
 
Date 2020-10-15T06:00:50Z
2020-10-15T06:00:50Z
2020
 
Type Article
 
Identifier Scientific Reports, 10: 17196
2045-2322
https://doi.org/10.1038/s41598-020-74144-3
https://www.nature.com/articles/s41598-020-74144-3
http://223.31.159.10:8080/jspui/handle/123456789/1114
 
Language en_US
 
Format application/pdf
 
Publisher Springer Nature Publishing AG