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|Title: ||Studies on the response of grape genotypes in relation to different levels of moisture stress|
|Authors: ||H K, Narendra Babu,|
|Guide/Chairperson: ||G S, Prakash|
|Issue Date: ||1999|
|Year of Submission: ||1999|
|Abstract: ||A pot trial experiment was conducted on six grape genotypes (Dogridge, Saltcreek, 1613,
St. George, Vitis champini clone and cultivar Thompson Seedless) with three levels of
moisture stress for a period of 14 days.
Of the six grape genotypes studied, the rootstocks, 1613, St. Geroge, Vitis
champini clone along with cultivar Thompson Seedless did not survive the stress under
100 per cent moisture stress condition. However, all of them survived under 50 per cent
stress condition. Under 100 per cent stress, all the genotypes showed general reduction in
Relative Water Content (RWC), Osmotic Potential (OP), Leaf Water Potential (LWP),
Transpiration rate (AE), Net Photosynthetic Rate (Pn) and Stomatal Conductance (Gs).
Under 50 per cent mositure stress RWC, AE, Pn, Gs, reduced in all the genotypes.
Whereas, they wre on par with the OP and LWP. Leaf temperature (LT) increased in all
the genotypes at both the stress levels. The N, P and K content reduced in all the
genotypes as a result of moisture stress. However, in Dogridge the N content in the leaves
of stressed plants was almost on par with the well watered plants.
Another experiment conducted on the diurnal variation of leaf RWC, OP and
LWP were maximum in the morning in all the three genotypes (Dogridge, Saltcreek and
Thompson Seedless) studied and reduced considerably by noon and slightly recovered in
the afternoon under complete moisture stress. Soil mositure content was reduced in all the
genotypes due to mositure stress.
In the root development studies with six grape genotypes the highest root dry
weight among all the categories of roots was found in Dogridge. Similarly, the dry weight
of the shoot as well as the plant height were maximum in the rootstock Dogridge.|
|University in which they received their degree: ||University of Agricultural Sciences, Bangalore|
|Degree Level: ||M.Sc|
|Appears in Collections:||DIVISION OF FRUIT CROPS|
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