Abstract
Chlorophyll a, b, a:b, carotenoid, carbohydrates, sugar, protein, and polyphenol content were estimated and their association with rhizome yield compared in 10 cultivars of ginger (Zingiber officinale Rose). The analyses indicated significant differences amongst the cultivars for all the studied parameters. The highest fresh rhizome yield (462.6 g/plant) was recorded in ‘Gorubathaney’ and the lowest (234.5 g/plant) in ‘Suprava’. Higher rhizome yields were highly associated with grater chlorophyll a and carbohydrate (r = 0.52 and 0.60 respectively) and lower polyphenol (r = ‐0.15) levels in the leaf. The protein content in the leaves of ginger showed significant correlation with carbohydrates and chlorophyll a:b ratio (r = 0.55 and r = 0.76 respectively). The chlorophyll a:b ratio also showed highly positive correlation with carbohydrate content (r = 0.92) of leaf. However, polyphenols showed a significant positive correlation with chlorophyll b and carotenoids and carotenoids with chlorophyll a and chlorophyll b.
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