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SALINITY STRESS STUDIES ON ROSELLE (Hibiscus sabdariffa L.) LANDRACES

KrishiKosh

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Title SALINITY STRESS STUDIES ON ROSELLE (Hibiscus sabdariffa L.) LANDRACES
 
Creator RATHNAM, K
 
Contributor SIVARAJ, N
 
Subject grain legumes, crops, climate, climatic change, marketing, yields, productivity, biological phenomena, precipitation, sowing
 
Description Roselle (Hibiscus sabdariffa L.) is an important leafy vegetable in the country and
used for medicinal and industrial purposes. Knowledge on physiological basis of salt
tolerance in Hibiscus sabdariffa plant species is an essential pre-requisite not only for
success of efforts aimed at selecting salt tolerant landraces, but also for perpetuation of their
biodiversity as well as their sustainability. Effect of salinity stress using different
concentrations (0.15%, 0.30% and 0.45%) of various salts (NaCl, Na2SO4, Na2CO3, NaCl+
Na2SO4, NaCl+ Na2CO3, Na2SO4+ Na2CO3, NaCl+ Na2SO4+ Na2CO3) was studied in three
landraces (R.K.S.I, R.K.S.II and R.K.S.III) of Roselle (Hibiscus sabdariffa L.) at 30 and 90
days after sowing. Salinity stress effects on germination and seedling growth was tested
under laboratory conditions. Germination percentage, seedling growth, estimation of
chlorophyll ‘a’, chlorophyll ‘b’ , total chlorophyll, carotenoids, reducing sugars, total
proteins, alpha amylase and proline, leaf area, stomatal index, stomatal frequency, soil pH
and electrical conductivity (E.C.) of the landraces were studied. The present study was
therefore, conducted with the objectives to determine the response of roselle landraces to
salinity stress at germination and seedling stages under controlled conditions. Moreover,
salts and their combinations viz., NaCl, Na2SO4, Na2CO3, NaCl+Na2SO4, NaCl+Na2CO3,
Na2SO4+Na2CO3, NaCl+Na2SO4+Na2CO3 were used for salinity stress induction in roselle
landraces. Based on the present study, the roselle landrace R.K.S. I (Hibiscus sabdariffa L.)
was found to be more salt tolerant than the other two landraces (R.K.S.III and R.K.S.II).
 
Date 2016-06-23T10:46:12Z
2016-06-23T10:46:12Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67814
 
Language en
 
Relation D9152;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY