Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis
The chloroplast protein AtDeg5 is a serine-type protease peripherally attached to thylakoid membrane at its lumenal side. Since reliable data regarding the role of AtDeg5 in controlling the course of growth and developmental processes are extremely limited, two independent T-DNA insertional lines wi...
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| Format: | Article |
| Language: | English |
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Polish Botanical Society
2015-03-01
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| Series: | Acta Societatis Botanicorum Poloniae |
| Subjects: | |
| Online Access: | https://pbsociety.org.pl/journals/index.php/asbp/article/view/4667 |
| _version_ | 1818967825793941504 |
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| author | Małgorzata Baranek Tomasz P. Wyka Grzegorz Jackowski |
| author_facet | Małgorzata Baranek Tomasz P. Wyka Grzegorz Jackowski |
| author_sort | Małgorzata Baranek |
| collection | DOAJ |
| description | The chloroplast protein AtDeg5 is a serine-type protease peripherally attached to thylakoid membrane at its lumenal side. Since reliable data regarding the role of AtDeg5 in controlling the course of growth and developmental processes are extremely limited, two independent T-DNA insertional lines with different extent of AtDeg5 reduction were prepared and ontogenesis stage-based analysis performed. Both mutant lines displayed a compensatory overaccumulation of AtDeg8. The repression of AtDeg5 protease altered a range of phenotypic features in at least one of the mutants, with the most prominent being changes in chronological progression of development and growth of individual rosette leaves, flower production and silique ripening as well as in the area of fully expanded leaves and chloroplast ultrastructure. By analyzing the results of parallel-mutant screening we conclude that AtDeg8 overdose may rescue 23% of AtDeg5 deficiency with regard to some AtDeg5-controlled traits; alternatively AtDeg5 may have catalytic sites in excess so that these traits might remain unaltered when AtDeg5 pool is reduced by 23%. For some other AtDeg5-dependent traits the absence of excessive amount of AtDeg5 catalytic sites, lack of AtDeg5 dosage effect and inability of AtDeg8 to compensate deficiency or absence of AtDeg5 occurred. |
| first_indexed | 2024-12-20T13:54:57Z |
| format | Article |
| id | doaj.art-ae5bea2312d348cda6ad047ff4a5fcfa |
| institution | Directory Open Access Journal |
| issn | 2083-9480 |
| language | English |
| last_indexed | 2024-12-20T13:54:57Z |
| publishDate | 2015-03-01 |
| publisher | Polish Botanical Society |
| record_format | Article |
| series | Acta Societatis Botanicorum Poloniae |
| spelling | doaj.art-ae5bea2312d348cda6ad047ff4a5fcfa2022-12-21T19:38:27ZengPolish Botanical SocietyActa Societatis Botanicorum Poloniae2083-94802015-03-01841597010.5586/asbp.2015.0013996Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in ArabidopsisMałgorzata Baranek0Tomasz P. Wyka1Grzegorz Jackowski2Department of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 PoznańDepartment of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 PoznańDepartment of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 PoznańThe chloroplast protein AtDeg5 is a serine-type protease peripherally attached to thylakoid membrane at its lumenal side. Since reliable data regarding the role of AtDeg5 in controlling the course of growth and developmental processes are extremely limited, two independent T-DNA insertional lines with different extent of AtDeg5 reduction were prepared and ontogenesis stage-based analysis performed. Both mutant lines displayed a compensatory overaccumulation of AtDeg8. The repression of AtDeg5 protease altered a range of phenotypic features in at least one of the mutants, with the most prominent being changes in chronological progression of development and growth of individual rosette leaves, flower production and silique ripening as well as in the area of fully expanded leaves and chloroplast ultrastructure. By analyzing the results of parallel-mutant screening we conclude that AtDeg8 overdose may rescue 23% of AtDeg5 deficiency with regard to some AtDeg5-controlled traits; alternatively AtDeg5 may have catalytic sites in excess so that these traits might remain unaltered when AtDeg5 pool is reduced by 23%. For some other AtDeg5-dependent traits the absence of excessive amount of AtDeg5 catalytic sites, lack of AtDeg5 dosage effect and inability of AtDeg8 to compensate deficiency or absence of AtDeg5 occurred.https://pbsociety.org.pl/journals/index.php/asbp/article/view/4667AtDeg5 proteasechronological progressionleaf morphologychloroplast ultrastructurestarch grains |
| spellingShingle | Małgorzata Baranek Tomasz P. Wyka Grzegorz Jackowski Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis Acta Societatis Botanicorum Poloniae AtDeg5 protease chronological progression leaf morphology chloroplast ultrastructure starch grains |
| title | Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis |
| title_full | Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis |
| title_fullStr | Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis |
| title_full_unstemmed | Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis |
| title_short | Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis |
| title_sort | downregulation of chloroplast protease atdeg5 leads to changes in chronological progression of ontogenetic stages leaf morphology and chloroplast ultrastructure in arabidopsis |
| topic | AtDeg5 protease chronological progression leaf morphology chloroplast ultrastructure starch grains |
| url | https://pbsociety.org.pl/journals/index.php/asbp/article/view/4667 |
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