TITLE:
Combined Action of Copper with IAA on Individual Amino Acids and Microelement in Pods of Two Broad Bean Cultivars
AUTHORS:
Hamdia Mahmoud Abd El-Samad, Mohamed Abdo Kheder Shaddad, Khloud Nagy Shaker
KEYWORDS:
Synergistic Effect, Amino Acids, Microelement, Broad Bean Cultivars
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.10 No.4,
April
29,
2019
ABSTRACT: It is worthy to mention that the two broad bean cultivars
displayed a surprising situation during the fruiting stage of growth. The
absolute amount of pods yield was higher in cv. Assiut 125 than in cv. Assiut
84. This situation was in contrast with that in the vegetative stage, where cv.
Assiut 84 produced greater vegetative growth than cv. Assiut 125. Although the
cv. Assiut 84 was less affected by the highest dose of copper, the cv. Assiut
125 was greatly affected by this dose. However, another surprising situation
was recorded when the absolute values of fresh and dry matter of cv. Assiut 125
were much higher than cv. Assiut 84 at any used copper concentration. The fresh
matters of the pods of cv. Assiut 84 and cv. Assiut 125 were 7.24 and 10.16 gm
at the level of control and 6.69 and 7.59 gm at the level of 350 ppm Cu,
respectively. Their dry matters were 1.99 and 3.52 gm at the level of control
and 1.77 and 2.13 gm at the level of 350 ppm Cu2+ in cv. Assiut 84 and cv. Assiut 125, respectively. This
contradiction was also extended when these copper-affected cultivars were
sprayed by IAA. The cv. Assiut 84 responded slightly to IAA treatment. On the
other hand, a considerable increase in the dry matter yield was recorded in the
pods of cv. Assiut 125 at any used level of copper when compared to the
non-sprayed plants treated by the same copper concentration. At the level of
350 ppm Cu2+ , the pod yield was 2-fold that of
plants treated only by 350 ppm Cu2+ , without IAA spraying. Thus, even IAA behaved differently
in its effect on the crop yield of the two tested broad bean cultivars. There
are big and surprising variations in the accumulation of microelements and
heavy metals in pods among the two broad bean genotypes, whatever the
treatments used. These variations seemed to be complicated which might need
further studies. The concentration of amino acids and their individuals also varied
among the two cultivars; they increased in cv. Assiut 84 and decreased in cv.
Assiut 125. The increased amino acids in cv. Assiut 84 are mostly used as precursors
for phytochelatins. For the previous studies, thus the present work was
conducted to explain the effect of Cu and interactive effect with IAA on two
selected broad bean cultivars Assiut 84 and Assiut 125 during yielding
production.