عنوان المقالة:بكتريا رايزوسفير أشجار زيتون منطقة الجوف: التعداد ، التنوع الظاهري وغربلة الأميليز AL-JOUF REGION OLIVE TREES RHIZOSPHERIC BACTERIA: ENUMERATION, PHENOTYPIC DIVERSITY, AND AMYLASE SCREENING
This preliminary bacteriological study of some Al-Jouf region olive trees rhizospheres aimed to investigate their
phenotypic bacterial diversity and amylase productivity. The results of olive cultivar age effect on total
rhizospheric bacteria were very low in seedlings compared to the adult threes, and generally variable according to
the following descending order Barri > Sorani > Romani > Russaei. Concerning olive cultivars genotype effect on
total rhizospheric bacteria, the results revealed on variable total rhizospheric bacteria associated with investigated
cultivars, according to the following descending order Barri (68.4 %) > Picual (23.5%) > Arbosana (7 %) >
Chetoui (1%), whereas the results of olive rhizospheric bacteria phenotypic diversity were variable according to the
following descending order Arbosana > Chetoui > Picual >Barri. The phenotypic diversity was characterized by
variations in colonies color, size, form, elevation, edges, and texture, with the dominance of pinpoint and red
colonies in Arbosana and Picual cultivars respectively, whereas Chetoui cultivar distinguished with brown pigment
diffusing colonies, which may be indicated siderophores secretion. In addition, amylase screening results showed
the superiority of Chemchali and Chetoui cultivars as efficient sources for amylase-producing bacteria which can
be exploited for further biotechnological applications.
تاريخ النشر
05/05/2022
الناشر
World Journal of Pharmaceutical and Life SciencesWJPLS
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