Abstract
Entamoeba histolytica contains a novel calcium-binding protein like calmodulin, which was discovered earlier, and we have reported the presence of its homologue(s) and a dependent protein kinase in plants. To understand the functions of these in plants, a cDNA encoding a calcium-binding protein isolated from Entamoeba histolytica (EhCaBP) was cloned into vector pBI121 in antisense orientation and transgenic tobacco plants were raised. These plants showed variation in several phenotypic characters, of which two distinct features, more greenness and leaf thickness, were inherited in subsequent generations. The increase in the level of total chlorophyll in different plants ranged from 60% to 70%. There was no major change in chloroplast structure and in the protein level of D1, D2, LHCP and RuBP carboxylase. These morphological changes were not seen in antisense calmodulin transgenic tobacco plants, nor was the calmodulin level altered in EhCaBP antisense plants.
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Abbreviations
- ABA:
-
abscisic acid
- CaM:
-
calmodulin
- CBl:
-
calcineurin B-like proteins
- CDPK:
-
calcium-dependent protein kinase
- CIPK:
-
CBL interacting protein kinases
- dZR:
-
dihydroxyzeatin riboside
- EF:
-
elongation factor motif
- EhCaBP:
-
Entamoeba histolytica calcium-binding protein
- GUS:
-
beta-glucuronidase
- IgG:
-
immunoglobulin G
- iPA:
-
isopentenyl adenosine
- LHCP:
-
light harvesting chlorophyll binding project
- LSU:
-
large subunit
- PCR:
-
polymerase chain reaction
- PKS11:
-
protein kinase 11
- PS:
-
photosystem
- RuBP:
-
ribulose-1,5-bisphosphate carboxylase/oxygenase
- SOS2:
-
salt overly sensitive 2
- TLC:
-
thin layer chromatography
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The results of this paper have been granted US Patent No. 6,791,009.
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Pandey, G.K., Pandey, A., Reddy, V.S. et al. Antisense expression of a gene encoding a calcium-binding protein in transgenic tobacco leads to altered morphology and enhanced chlorophyll. J Biosci 32, 251–260 (2007). https://doi.org/10.1007/s12038-007-0025-0
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DOI: https://doi.org/10.1007/s12038-007-0025-0