Botanical studies on Pisum sativum L. under the effect of gamma irradiated seeds and irrigation with different sea water salinity
2011
El-Saadony, F.M. | El-Mosallamy, H.M. | Mokable, E.M.M. | Saeed, M.N.A.
Two pot experiments were conducted on pea plants cv. Master B during the two successive winter growing seasons of 2008 and 2009 to evaluate the efficiency of pre-sowing seed exposure to different y-irradiation doses; different sea water salinity levels beside tap water as a control (for irrigation) and their interactions effect on plant morphology, plant physiology as well as leaf anatomy. Increasing -f-irradiation dose up to 3 K-rad significantly increased plant height, number of leaves/plant, dry weight of plant, leaf tissue contents of chlorophyll (a and b), carotenoids and total chlorophyll. Also, blade thickness, palisade tissue, spongy tissue and midvein bundle of leaves were gradually increased under irradiation levels up to 3 k-rad. Further increases in y-ray dose up to 7 K-rad decfeased all the above-mentioned characters. Proline content and ,catalase activity in leaf tissues were linearly increased with increasing irradiation up to the highest tested dose of 7 K-rad. decreases in plant morphology and leaf anatomy characters were recorded with increasing salinity concentration up to the highest tested level of 6000 ppm. On contrary, proline percentage and catalase activity in leaf tissues exhibited opposite trend with increasing salinity level up to 6000 ppm. The best beneficial interaction treatment was pre-sowing treating pea seeds by 3 k- rad y-irradiation x irrigation by tap water(control).
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