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- Title
Analysis of functional traits in Gracilaria dura (Rhodophyta: Gracilariacae) reveals variation in wild and farmed populations.
- Authors
Sambhwani, Kanchan; Mathukiya, Gangotri; Dawange, Pankaj S.; Sequeira, Rosy Alphons; Prasad, Kamalesh; Mantri, Vaibhav A.
- Abstract
Seaweeds, due to their diverse product profile, are in huge demand globally, and therefore, to meet feedstock requirements, farming is pivotal. Gracilaria dura from Indian waters, due to its quality agar, has recently gained industry attention. This species has shown considerable phenotypic differences in wild and cultivated clones after uninterrupted farming for the last 15 years via vegetative propagation. Thus, to further assess the changes at the biochemical level, these two populations were studied for three consecutive months, viz. December, January and February. The daily growth rate (DGR) ranged 3.52 ± 0.56 to 4.54 ± 0.31% day−1 for cultivated samples and 3.11 ± 0.29 to 4.20 ± 0.39% day−1 for wild samples. The cultivated samples showed 1.5 times higher DGR and 1.8 times higher productivity in December assemblage, respectively. Antioxidant potential was statistically similar for both samples and ranging from 0.029 ± 0.004 to 0.092 ± 0.001 mg g−1 FW ascorbic acid equivalent. Amongst the proximate parameters, protein 22.38%, lipid 25% and carbohydrate 30.67% were significantly higher in February cultivated samples. The native agar yields ranged from 5.02 to 3.43% on fresh weight biomass for all samples. February cultivated samples gave a high agar yield, but the gel strength was the highest in December cultivated sample with lower sulphate (2.51% ± 0.21) and higher 3,6-anhydro-galactose content (31.21% ± 2.02). The hormone auxin (IAA) was significantly higher in December assembled wild samples, whereas gibberellic acid (GA3) was higher for the cultivated samples of all the months. The present study, for the first time, confirmed the occurrence of statistically significant differences in functional traits of economic importance. Further studies in this context are crucial for crop management and for developing elite strains through breeding.
- Publication
Journal of Applied Phycology, 2022, Vol 34, Issue 2, p1017
- ISSN
0921-8971
- Publication type
Article
- DOI
10.1007/s10811-022-02697-z