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Paper Information

Journal:   IRANIAN JOURNAL OF MEDICINAL AND AROMATIC PLANTS   September-October 2018 , Volume 34 , Number 4 (90) ; Page(s) 617 To 628.

Phytochemical properties of three genotypes of Cyamopsis tetragonoloba L. under irrigation regimes and sowing dates

Author(s):  Meftahizade h., HAMIDOGHLI Y., ASSAREH M.H.*, JAVANMARD DAKHELI M.
* Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
This research was aimed to investigate the effects of sowing date and irrigation regimes on phytochemical attributes of guar genotypes. The study was conducted in a split-split plot randomized block design including two sowing dates (15th and 30th July), four irrigation regimes, and three genotypes with three replication for two seasons (2015 and 2016). The seeds were harvested and ethanolic extraction was prepared to analyze physicochemical traits such as antioxidant activity, phenol, tannin, protein, viscosity, galactomannan content, etc. The results showed that there were significant differences (P≤ 0. 01%) between sowing date and irrigation regimes in case of phytochemical traits, seed protein, galactomannan content, and minerals. The range of galactomannan content was 28-33%, where the maximum galactomannan level (33. 8%) was recorded for the interaction of late sowing date × four-stage irrigation schedule. Among the genotypes studied, the third genotype (RGC-1066) had the highest antioxidant activity and gum protein percentage. There is no significant difference among the genotypes for other characteristics. Late sowing date, G3 (RGC-1066) and four-stage irrigation schedule during growth cycle were the best treatments. The results of this study showed that guar planting in the study area is positively evaluated in terms of mineral materials, protein content, and gum viscosity; therefore, its development can be recommended in the agronomic program.
Keyword(s): Cyamopsis tetragonoloba L.,sowing date,DPPH,galactomannan,antioxidant,viscosity
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