Journal of Stress Physiology &
Biochemistry, Vol. 9 No. 3
2013, pp. 84-97 ISSN 1997-0838
Original Text Copyright (cc) 2013 by Nadernejad, Ahmadimoghadam,
Hossyinifard, Poorseyedi
ORIGINAL ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 2
Evaluation of PAL activity,
Phenolic and Flavonoid Contents in Three Pistachio (Pistacia vera L.) Cultivars Grafted
onto Three Different Rootstocks
N. Nadernejad*1, A.
Ahmadimoghadam 1, J. Hossyinifard 2, S.
Poorseyedi 3
1 Biology Department, Faculty
of science, Shahid Bahonar University of Kerman, Iran 2 Nutrition and Irrigation Department, Iran’s Pistachio
Research Institute, Iran 3 Plant Breeding Department, Faculty of Agriculture, Shahid
Bahonar University of Kerman, Iran
Phenylalanine
ammonia lyase (PAL) is a biochemical marker of the environmental stress
and plays a pivotal role in phenolic synthesis. The lower ROS level and
oxidative damage was observed in grafted plants and the rootstocks have
a profound influence on the biochemical composition, especially
phenolic compounds. Regarding the importance of the effect rootstocks
have on scion in pistachio trees, this study was carried out to assess
and compare three pistachio cultivars ("Ahmadaghaii", "Ohadi" and
"Kallehghuchi") on three rootstocks (Mutica, Ahli, Sarakhs). PAL
activity, phenolic compounds, flavonoid and anthocyanin contents in
leaves, flowers and fruits were measured toward the selection of the
most suitable and compatible rootstock/scion resistant to environmental
stresses. The results showed that PAL activity was different among the
cultivars and organs. A positive correlation was observed between PAL
activity and phenolic compounds in the leaves and flowers of Mutica-
Ahmadaghaii, suggesting that it is more resistant than the others to
environmental stresses. PAL activity and total phenolics in fruits of
pistachio suffered a decrease when the maturation processes began. The
hulls of the pistachio fruits contained high levels of phenolic
compounds especially in Mutica-Ahmadaghaii) suggesting its function as
a protective layer and a defense chemical against ultraviolet radiation
and pathogen. Our results indicated the presence of a number of
bioactive compounds in kernels with the highest amount belonging to
Mutica- Ahmadaghaii, and therefore it is concluded that pistachio
rootstocks may affect the antioxidant compounds in kernels.
