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dc.contributor.authorKaur, Kamaljit-
dc.contributor.authorGupta, Anil K-
dc.contributor.authorKaur, Narinder-
dc.description.abstractThe effect of water deficit on carbohydrate status and enzymes of carbohydrate metabolism (⍺ and β amylases, sucrose phosphate synthase, sucrose synthase, acid and alkaline invertases) in wheat (Triticum aestivum L.) was investigated in the seedlings of drought-sensitive (PBW 343) and drought-tolerant (C 306) cultivars. The water deficit was induced by adding 6% mannitol (water potential -0.815 Mpa) in the growth medium. The water deficit reduced starch content in the shoots of tolerant seedlings as compared to the sensitive ones, but increased sucrose content in the shoots and roots of tolerant seedlings, indicating their protective role during stress conditions. It also decreased the ⍺-amylase activity in the endosperm of seedlings of both the cultivars, but increased ⍺ and β amylase activities in the shoots of tolerant ones. Sucrose phosphate synthase (SPS) activity showed a significant increase at 6 days of seedling growth (DSG) in the shoots of stressed seedlings of tolerant cultivar. However, SPS activity in the roots of stressed seedlings of sensitive cultivar was very low at 4 DSG and appeared significantly only at day 6. Sucrose synthase (SS) activity was lower in the shoots and roots of stressed seedlings of tolerant cultivar than sensitive ones at early stage of seedling growth. Higher acid invertase activity in the shoots of seedlings of tolerant cultivar appeared to be a unique characteristic of this cultivar for stress tolerance. Alkaline invertase activity, although affected under water deficit conditions, but was too low as compared to acid invertase activity to cause any significant affect on sucrose hydrolysis. In conclusion, higher sucrose content with high SPS and low acid invertase and SS activities in the roots under water deficit conditions could be responsible for drought tolerance of C 306.en_US
dc.sourceIJBB Vol.44(4) [August 2007]en_US
dc.subjectTriticum aestivum Len_US
dc.subjectWater deficiten_US
dc.subjectAcid invertaseen_US
dc.subjectAlkaline invertaseen_US
dc.subject⍺ and β-Amylaseen_US
dc.subjectSucrose phosphate synthaseen_US
dc.subjectSucrose synthaseen_US
dc.titleEffect of water deficit on carbohydrate status and enzymes of carbohydrate metabolism in seedlings of wheat cultivarsen_US
Appears in Collections:IJBB Vol.44(4) [August 2007]

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