Response of Datura innoxia Linn. to Gamma Rays and Its Impact on Plant Growth and Productivity

被引：14
作者：
Aref I.M. [1 ]
Khan P.R. [1 ]
Al Sahli A.A. [2 ]
Husen A. [3 ]
Ansari M.K.A. [4 ]
Mahmooduzzafar [4 ]
Iqbal M. [4 ]
机构：
[1] Department of Plant Production, College of Food & Agricultural Sciences, King Saud University, PO Box 2460, Riyadh
[2] Department of Botany & Microbiology, College of Science, King Saud University, PO Box 2455, Riyadh
[3] Department of Biology, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gonder
[4] Department of Botany, Jamia Hamdard, Hamdard Nagar, Tughlaqabad, 110062, New Delhi
来源：
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences | 2016年 / 86卷 / 3期
关键词：
Gamma rays; Hormesis; Hyoscyamine; Seed germination; Seedling growth;
D O I：
10.1007/s40011-014-0485-6
中图分类号：
学科分类号：
摘要：
Dry scarified seeds of Datura innoxia Linn. were gamma-irradiated with 5, 10, 20, 40, 60 and 80 Gy radiation, using a cobalt-60 source at the rate of 0.623 Gy min−1 at room temperature, and germinated on MS-medium in a growth chamber under controlled conditions. Exposure to low dose(s) of radiation (5 Gy) caused stimulatory effect on seed germination. Analysis of 90-day-old seedlings revealed that growth rate of root and shoot, net photosynthetic rate (PN), stomatal conductance (gs) and the chlorophyll and carotenoid contents increased with 5 Gy radiations. Higher doses proved inhibitory for all the above parameters; the decline observed was positively correlated with increase in intensity of gamma radiation. Intercellular CO2 (Ci), on the other hand, showed an opposite trend, being lower with 5 Gy than in the control, but significantly higher with increased radiation doses. Hyoscyamine, a tropane alkaloid, exhibited only irregular and non-significant variation in its content, with no perceptible change in structure, in the treated material, indicating that gamma-irradiation caused no significant alteration in the quantity or quality of the compound. © 2015, The National Academy of Sciences, India.
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页码：623 / 629
页数：6
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