Abstract
We investigated phenotypes of the double mutants of the calcium (Ca2+) signaling genes plc-1, splA2, and cpe-1 encoding for a phospholipase C1 (PLC-1), a secretory phospholipase A2 (sPLA2), and a Ca2+/H+ exchanger (CPE-1), respectively, to understand the cell functions regulated by their genetic interactions. Mutants lacking plc-1 and either splA2 or cpe-1 exhibited numerous defects including reduced colonial growth, stunted aerial hyphae, premature conidiation on plates with delayed germination, inappropriate conidiation in submerged culture, and lesser mycelial pigmentation. Moreover, the ∆plc-1; ∆splA2 and ∆plc-1; ∆cpe-1 double mutants were female-sterile when crossed with wild type as the male parent. In addition, ∆plc-1, ∆splA2, and ∆cpe-1 single mutants displayed higher carotenoid accumulation and an increased level of intracellular reactive oxygen species (ROS). Therefore, the pleiotropic phenotype of the double mutants of plc-1, splA2, and cpe-1 suggested that the genetic interaction of these genes plays a critical role for normal vegetative and sexual development in N. crassa.
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The FGSC generously waived charges for strains. The FGSC was supported by NSF Grant BIR-9222772. AB was supported by a Research Fellowship from the Ministry of Human Resource Development, Government of India. We thank IIT Guwahati, and Department of Biotechnology, Government of India (BT/PR3635/BCE/8/892/2012), for partial financial support.
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Barman, A., Tamuli, R. The pleiotropic vegetative and sexual development phenotypes of Neurospora crassa arise from double mutants of the calcium signaling genes plc-1, splA2, and cpe-1 . Curr Genet 63, 861–875 (2017). https://doi.org/10.1007/s00294-017-0682-y
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DOI: https://doi.org/10.1007/s00294-017-0682-y