Title of article :
Determination of Indole-3-Acetic Acid at Different Positionsand and Types of Grains in Wheat by Fluoresence Spectrometry
ارادتمند اصلي، داوود نويسنده استاديار دانشكده كشاورزي دانشگاه آزاد اسلامي واحد ساوه Eradatmand Asli, Davoud , اقدامي، انوش نويسنده دانشگاه آزاد ساوه Eghdami , anosh
Issue Information :
فصلنامه با شماره پیاپی 0 سال 2010
Dry matter accumulation and indole-3-acetic acid (IAA) level of grains in various positions within the wheat
(Triticum aestivum L. Var. PBW-343) spike and spikelet were investigated during the grain filling period.
Mother shoots were partitioning into proximal, middle and distal regions and further into bold and small grains.
Ten labeled spikes were sampled every 4 days from 3 days after anthesis (DAA) to 23 DAA, and every 7 days
from 23 DAA to maturity. Results have shown that the IAA level increased rapidly from about 7 until 19 days
after anthesis and then decreased depends upon the position of grains in spike and spikelet. The differences in
IAA levels, both among spikelets in different regions of the spike and also among grains within a spikelet, were
positively correlated with the differences in dry matter accumulation. The close spatial and developmental
correlation between IAA concentration and dry matter accumulation indicates a causal relationship between
endosperm cell division and/or enlargement and IAA levels. The results suggest that IAA in the grains during
the early phase of grain development play an important role in regulating grain filling pattern and consequently
influence grain filling percentage.
Journal title :
Organic Chemistry Journal