Indian Journal of Geo-Marine Sciences

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Morpho-molecular assessment of Acetabularia jalakanyakae Sp. Nov. (Dasycladales, Chlorophyta) - a new species from Andaman and Nicobar Islands, India


Affiliations
1 Department of Botany, Central University of Punjab, Ghudda-VPO, Bathinda – 151 401, India
2 Department of Plant Sciences, Central University of Kerala, Kasaragod – 671 316, India
3 Department of Botany, DAV College, Bathinda – 151 001, India

Acetabularia (Dasycladales) is an extant genus of a single-celled green alga. There are four species of this genus reported from India, three reported from Andaman and Nicobar Islands. For this study, Acetabularia isolate was collected from a rocky intertidal habitat in the Andaman and Nicobar Islands. Light microscopy and Scanning Electron Microscopy were used for the morphological characterization. The distinct traits of caps of the thalli were prioritized because, traditionally, species delimitations in Acetabularia mainly were based on cap morphology. Our isolate showed morphological similarity with Acetabularia crenulata. However, the number of hairs in the inner ring of lobes of caps and the stalk length were observed to be different from A. crenulata and other closely related species. The phylogenetic tree constructed for partial 18S rDNA using the Maximum Likelihood (ML) method revealed the evolutionary affinity of this new species with Acetabularia dentata. Based on morphological and molecular synapomorphy, a new species of Acetabularia, Acetabularia jalakanyakae is formally proposed herein, and the further implications of this species discovery are discussed.
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  • Morpho-molecular assessment of Acetabularia jalakanyakae Sp. Nov. (Dasycladales, Chlorophyta) - a new species from Andaman and Nicobar Islands, India

Abstract Views: 161  | 

Authors

K C Saini
Department of Botany, Central University of Punjab, Ghudda-VPO, Bathinda – 151 401, India
A Madhu
Department of Plant Sciences, Central University of Kerala, Kasaragod – 671 316, India
R K Kohli
Department of Botany, Central University of Punjab, Ghudda-VPO, Bathinda – 151 401, India
K Gupta
Department of Botany, DAV College, Bathinda – 151 001, India
F Bast
Department of Botany, Central University of Punjab, Ghudda-VPO, Bathinda – 151 401, India

Abstract


Acetabularia (Dasycladales) is an extant genus of a single-celled green alga. There are four species of this genus reported from India, three reported from Andaman and Nicobar Islands. For this study, Acetabularia isolate was collected from a rocky intertidal habitat in the Andaman and Nicobar Islands. Light microscopy and Scanning Electron Microscopy were used for the morphological characterization. The distinct traits of caps of the thalli were prioritized because, traditionally, species delimitations in Acetabularia mainly were based on cap morphology. Our isolate showed morphological similarity with Acetabularia crenulata. However, the number of hairs in the inner ring of lobes of caps and the stalk length were observed to be different from A. crenulata and other closely related species. The phylogenetic tree constructed for partial 18S rDNA using the Maximum Likelihood (ML) method revealed the evolutionary affinity of this new species with Acetabularia dentata. Based on morphological and molecular synapomorphy, a new species of Acetabularia, Acetabularia jalakanyakae is formally proposed herein, and the further implications of this species discovery are discussed.