تعريض النموات الخضرية لأشعة الليزر و أثره في بعض الصفات الخضرية و البيوكيميائية لنخيل التمر Phoenix dactylifera L. المكثر نسيجيا

Abstract EN

This study was conducted in date palm research center for the period from June 2013 until June 2014 in aim recognize the effect of exposure the explants of date palm of lasers at different distances and different periods of time in formation of buds and numbers as well as in some the vegetative characteristics and biochemical.

the explants treated once a week for 10 weeks as the explants exposure for a period (0,25.50)second and (5 and 10)cm from the source of the laser the results showed 1-Led exposure of explants treatments for laser to increase the number of vegetative buds formed as the observed rise the number of buds at distance 5 cm and for period exposing 25 second as it gave 6.22 buds compared with the other treatments and the control treatment .also the same treatment gave less period of time to formed the buds as 80.3 days with the significant difference compared with control treatment .

2- The results showed the exposure of explants for laser led to reduce in the content of phenol compounds ,noting lower content at distance 5 cm and for period exposing 25 second reached 80.1% with the significant difference compared with control treatment .

3- Exposure of explants for laser led to increase of carbohydrate content material as given the treatment at distance 5 cm and for period exposing 25 second highcontent of carbohydrate as well as the same treatment led to increase the content of total protein with the significant difference compared with control treatment .

4- This study showed that exposure of the explants of laser-ray has led to increase of total content of chlorophyll as the observed the treatment at a distance 5 cm and period 25 second gave the high content of total chlorophyll reached 0.188% compared with the control treatment.