International Journal of Agricultural Policy and Research
Vol.2 (12), pp. 421-443,December 2014
Article 14/ID/ JPR193/23/ pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
Leaf water relation of four radish (Raphanus sativus L. var. sativus) cultivars grown in controlled cabinets under varying temperatures and irrigation levels
Caser G. Abdel
SG. Um IFGPAG, Leibniz Universität, Hannover, Germany.
Author Email: caser.abdel(at)yahoo.com
Topsi, Famox F1, Corox F1 and Altox F1 radish cultivars were grown in controlled 20 and 12°C cabinets and they were subjected to 0, 33, 66 and 100% depletion of peat moss available water capacity (AWC). The objective of this experiment was to determine the performances of leaf growth and their water relations of four radish cultivars in response to varying temperatures and irrigation levels. The obtained results showed that radish grown in 20°C cabinet substantially exceeded that grown in 12°C in leaf saturation weight, leaf fresh weight, leaf dry weight by 7.39, 101.55 and 89.74%, respectively. On the other hand, 12°C grown radish highly exceeded that of 20°C in leaf water potential (6.44%). 0% AWC substantially bypassed that of 100%AWC depletion in terms of saturated and fresh weight of leaves, leaf water conductance and leaf water content by 144 and 141.1, 568.6 and 53.1%, respectively. 100% WAC depletion significantly exceeded that of 0% AWC depletion by 53.92, 53.79 and 238.4, 78.15%, in terms of leaf dry matter percentages, leaf water saturation deficits, leaf water potentials and leaf osmotic potentials. Cultivars performed better in terms of leaf growth at constant day: night ratio for 20°C than 12°C showing that performance might be better if there was thermoperiodism owing to alteration in cell growth rate. Cultivar performance under varying temperatures and water availabilities in term of leaf growth were categorized as Topsi> Famox F1> Altox F1> Corox F1.
Key words: Radish, Raphanus sativus, temperature, irrigation, leaf water potential, leaf water conductance, leaf osmotic potential.