کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5515641 1541912 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research articleA role for CK2 β subunit 4 in the regulation of plant growth, cadmium accumulation and H2O2 content under cadmium stress in Arabidopsis thaliana
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Research articleA role for CK2 β subunit 4 in the regulation of plant growth, cadmium accumulation and H2O2 content under cadmium stress in Arabidopsis thaliana
چکیده انگلیسی


- CKB4 overexpression enhances cadmium stress-triggered inhibition of plant growth.
- CKB4 overexpression increases cadmium and H2O2 accumulation under cadmium stress.
- CKB4 modulates the expression of the genes involved in cadmium transport and H2O2 scavenge under cadmium stress.
- CKB4 and thereby CK2 are involved in the regulation of plant response to cadmium stress.

Protein kinase CK2, which consists of two α and two β subunits, plays an essential role in plant development and is implicated in plant responses to abiotic stresses, including salt and heat. However, the function of CK2 in response to heavy metals such as cadmium (Cd) has not yet been established. In this study, the transgenic line CKB4ox, which overexpresses CKB4 encoding the CK2β subunit and has elevated CK2 activity, was used to investigate the potential role of CK2 in response to Cd stress in Arabidopsis thaliana. Under Cd stress, CKB4ox showed reduced root growth and biomass accumulation as well as decreased chlorophyll and proline contents compared with wild type. Furthermore, increased Cd accumulation and a higher H2O2 content were found in CKB4ox, possibly contributing to the inhibition of CKB4ox growth under Cd stress. Additionally, altered levels of Cd and H2O2 were found to be associated with decreased expression of genes involved in Cd efflux, Cd sequestration and H2O2 scavenging. Taken together, these results suggest that elevated expression of CKB4 and increased CK2 activity enhance the sensitivity of plants to Cd stress by affecting Cd and H2O2 accumulation, including the modulation of genes involved in Cd transport and H2O2 scavenging. This study provides direct evidence for the involvement of plant CK2 in the response to Cd stress.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 109, December 2016, Pages 240-247
نویسندگان
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