1. Cyclin B1;1 activity is observed in lateral roots but not in the primary root during lethal salinity and salt stress recovery
- Author
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Vivek Ambastha and Yehoram Leshem
- Subjects
0106 biological sciences ,0301 basic medicine ,Programmed cell death ,Budding ,Stress recovery ,biology ,Transgene ,Plant Science ,Salt Tolerance ,biology.organism_classification ,01 natural sciences ,Plant Roots ,Salt Stress ,Salinity stress ,Cell biology ,Addendum ,Salinity ,03 medical and health sciences ,030104 developmental biology ,Gene Expression Regulation, Plant ,Arabidopsis ,Cyclin B1 ,010606 plant biology & botany ,Transcription Factors - Abstract
Earlier, we reported that Arabidopsis young lateral roots (LR) exhibited improved lethal salinity tolerance as compared with the primary root (PR). We have shown that cell death processes which take place in the PR during salt stress are postponed in the LR. Still, very little is known about the regulation of cell survival mechanisms in the LR during salinity stress. Here we used transgenic Arabidopsis plants expressing Cyclin B1;1:GUS, to further study the responses to salinity in the PR and LR positions. We found strong Cyclin B1;1:GUS activity in young budding LR of salt stressed and stress recovered plants. The Cyclin B1;1:GUS activity dropped significantly in long LR and was almost completely abolished in the PR. Our data provides another line of evidence that position-dependent response occurs in Arabidopsis roots during lethal salinity. The possible roles Cyclin B1;1 plays in the young LR during the response to lethal salinity are discussed.
- Published
- 2020