PJB-2018-808
THE AMELIORATIVE EFFECT OF SEED PRIMING WITH CACL2 ON WHEAT GROWTH IN SALINE ENVIRONMENT
AttaUllah Khan
Abstract
Soil salinization is one of the main causes of soil degradation and limited agricultural productivity throughout the world. The present research work aimed to address the salt stress by improving the growth with seed priming of wheat varieties. The experiment was performed to assess the influence of seed priming (with 50 mM CaCl2 vs. control) and four salinity levels (0, 3, 6, 9 dSm-1) on morphological characters of six wheat varieties (Lalma-13, Atta-Habib-10, Pirsabak-08, Pirsabak-05, Saleem-00 and Inqilab-91). The experimental results indicated that all growth parameters were decreased with salinity stress, compared with control. Maximum leaves plant-1 (18.25), shoot length (56.86 cm), root length (22.59 cm), root dry weight (0.48 g plant-1), root to shoot ratio (0.219) and minimum shoot Na+ content (1.11 mg g-1 dry weight) were observed in variety Pirsabak-05. Wheat variety Lalma-13 produced highest shoot dry weight (2.19 g plant-1), tiller plant-1(4.16) and lowest days to emergence (8.38). The salinity level of 6 and 9 dSm-1 has decreased leaves plant-1(16.47 and 14.66), tillers plant-1(3.55 and 2.95), shoot length (48.11 and 40.07cm), root length (18.88 and 13.87cm), shoot dry weight (1.85 and 1.49g), more days to emergence(9.25 and 9.92) and highest shoot Na+ content (1.31 and 1.80 mg g-1 dry weight) compared with control salinity. Seed priming with CaCl2 has significantly upgraded all studied growth parameters except shoot length and root length. It is concluded that the experiment has reflected positive impact of seed priming on improving the growth attributes of wheat crop when exposed to both saline and non-saline growth conditions
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