Journal of Food, Agriculture and Environment

The salinity effect on  leaf pigment content of roselle (Hibiscus sabdariffa L.) at different growth stages

Author(s):

Rathnam  Kadamanda

Recieved Date: 2018-10-10, Accepted Date: 2018-12-27

Abstract:

The response of three roselle landraces (RKS-1, RKS-2 and RKS-3) against eight salts (distilled water as control, NaCl, Na₂SO₄, Na₂CO₃, NaCl+Na₂SO₄, NaCl+Na₂CO₃, Na₂SO₄+Na₂CO₃, NaCl+Na₂SO₄+Na₂CO₃) with three salinity levels (0. 15, 0.30 and 0.45%) were studied at different growth stages on leaf pigment content. The experiment was designed with 2 replications in factorial arrangement using completely randomized design. The present study indicates that the salts and salinity conditions were significantly affecting on leaf pigments at seedling stage, 30 days after sowing (DAS) and 90 DAS. Na₂CO₃ had been shown significantly negative effect on chlorophyll a, b and carotenoids of all land races at seedling stage. The mean performance of RSK-3 showed significantly high chlorophyll a, b and carotenoids (1.204, 0. 469, 1.778 and 1.570), respectively, at seedling stage. RSK-2 had significantly higher chlorophyll a, b, total chlorophyll and total carotenoids with most of salt concentrations among the landraces at seedling stage. Interaction between salts and landraces showed that RSK-1 recorded significantly higher chlorophyll-a, b (1.605 and 1. 283) with NaCl+Na₂CO₃, total chlorophyll with NaCl+Na₂SO₄+Na₂CO₃ and total carotenoids (1.070) with NaCl+Na₂SO₄+Na₂CO₃ at 30 DAS. RSK-3 recorded significantly higher chlorophyll a (1.581) with Na₂CO₃, chlorophyll b (1.562) with NaCl+Na₂SO₄+Na₂CO₃, total chlorophyll (0.826) with NaCl+Na₂SO₄+Na₂CO₃ and carotenoids (1.188) with NaCl+Na₂CO₃ at 90 DAS. Finally among all land races, RSK-3 showed more tolerance with respect of leaf pigments at salinity conditions.

Keywords:

Roselle, leaf pigments, salinity, growth stages

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Journal: Journal of Food, Agriculture and Environment
Year: 2019
Volume: 17
Issue: 1
Category: Agriculture
Pages: 36-39

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