The effect of carbon nanotubes on germination, seed vigor and photosynthetic pigmentation of maize hybrids (Zea Mays L.) under drought stress

Heshmat Omidi

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=116576
Date :  2019/10/03
Publish in :    بوم شناسي گياهان زراعي - دانش نوين کشاورزي پايدار سابق


Keywords :nanotubes, germination, drought, stress

Abstract :

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Abstract This investigation with the purpose of enhancement quantity and quality parameters of seed germination of corn hybrids with proceeds of carbon nanotubes (CNTs) under drought stress was complemented as a factorial experiment in a completely randomized design with three replications at the Seed Technology Laboratory Faculty of Agriculture (STLFA), Shahed University. Using polyethylene glycol 6000 solution drought stress were established at levels 0, -0.5 and -1 Mpa on seed pretreated with concentrations of 0, 0.25 and 50 mg/L carbon nanotubes(CNTs) on two corn hybrids Fajr and Dehghan. The results showed that the triple interactions corn hybrids, nano-priming and drought stress was significant on germination indices including percentage and rate of germination, seedling vigor index of length and weight and seedling physiological traits including chlorophyll a, b and total, and carotenoid content. Germination percentage of two corn hybrids of Fajr and Dehghan using 50 mg/L with carbon nanotubes (CNTs) under -1 Mpa of drought stress, superior than control treatment, obtained 98.33 and 95.5, respectively. In the application of 50 mg/L with carbon nanotubes (CNTs) under -1 Mpa of drought stress compared to control treatment, total chlorophyll, chlorophyll a, and chlorophyll b and carotenoid content was 40.15, 24.29, and 15.79 and 19.69 mg/g FW, respectively. Nano-priming with carbon nanotubes improved the traits under drought stress conditions. Therefore, it is recommended to use 25 mg/L concentrations of carbon nanotubes to increase the percentage and seed germination rate of the corn seeds in arid and semi-arid regions. Keywords  Seed Pretreatment  Nanopriming  Dehghan Hybrid  Fajr Hybrid