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Pakistan Journal of Biological Sciences

Year: 2005 | Volume: 8 | Issue: 7 | Page No.: 978-981
Research Article

Rooting of Aerial Offshoots of Four Date Palm (Phoenix dactylifera L.) Cultivars by Air Layering Method using Polyethylene Bags

Rashid S. Al-Obeed
Faculty of Agriculture, P.O. Box 2460, King Saud University, Riyadb,11451, Saudia Arabia
Ten aerial (high and unrooted) offshoots of each of four date palm (Phoenix dactylifera L.) cultivars namely Succary, Seleg, Segie and Khalas were wrapped using polyethylene bags and treated with or without (treated or untreated) commercial Naphthalene Acetic Acid powder (Radicante, 0.8% NAA) . The results revealed that, after 6 months of treatment application in the first season, Segie and Khalas produced well developed root system, while Succary and Seleg produced poor roots. In the second season, the two cultivars Segie and Khalas rooted easily within four months and the other two cultivars Succary and Seleg did not root until left for longer period (within 8 months after treatment application). Data showed that the cultivars differ in number of small roots (diameter < 0.5 cm), number of large roots (diameter >0.5 cm), mean root length, weight of large and small roots, percentage of large and small roots and total root weight in the two seasons of study. Total root weight varied from 2.4 g in Seleg cultivar to 45.3 g in Succary within 6 months compared to 163.5 and 477.6 g for the two cultivars, respectively within 8 month after treatment application. The second year data showed significant higher mean root length in Succary compared to the two cultivars, Segie and Khalas. As for the NAA treatments, the untreated offshoots in the second season gave significant higher values of total root weight, small root weight and percentages of small and large root weights compared to the treated ones, while a different trend (though not significant) was observed in the first season. This difference was thought to be due to the variation in the endogenous hormones of the two groups (easy and difficult-to root cultivars). Wrapping the offshoots bases with polyethylene bags proved to be suitable for aerial offshoot rooting since the polyethylene bags maintained the moisture around the offshoots bases all the duration of the study
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Maiada Mohamed EL Dawayati Reply

Dear Dr Rashid I'm intrestting in this work about how to root the high off shoots of some Egyption cultivars of datepalm please Iwant more refrences if u have can u send to me
Thanks alot

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References

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