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Abstract - Issue Nov 2014, 35 (6) Back
nstantaneous and historical temperature effects on a-pinene
of alpha-naphthalene acetic acid and thidiazuron on seedling of economic
crops grown in endosulfan sulfate-spiked sand
Somtrakoon1* and Maleeya Kruatrachue2
Biology, Faculty of Science, Mahasarakham University, Kantharawichai,
Mahasarakham, Thailand, 44150
Biology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok,
Authors Email : email@example.com
10 January 2013
22 July 2013
05 October 2013
effect of two plant growth regulators, alpha-naphthalene acetic acid (NAA)
and thidiazuron (TDZ) on the growth of sweet corn (Zea mays), cowpea (Vigna
sinensis) and cucumber (Cucurmis sativus) seedling planted in
1-100 mg kg-1 of endosulfan sulfate spiked sand was investigated.
Endosulfan sulfate had no apparent toxicity as seedlings of these crop plants
grew normally in endosulfan sulfate spiked sand. Concentration of endosulfan
sulfate in sand affected the response of seedling induction by NAA or TDZ.
Induction of crop seeds by NAA or TDZ did not promote growth of sweet corn,
cowpea and cucumber to an appreciable extent. Both plant regulators at
concentration of 10 mg l-1 seemed to exert adverse effect on crop
seedling. TDZ decreased shoot length, root length and chlorophyll contents in
leaves of sweet corn and cowpea growing in endosulfan sulfate spiked sand. In
contrast, NAA was not toxic and promoted growth of sweet corn and cowpea
seedling. However, cucumber was affected by NAA and TDZ more than other
plants. TDZ significantly decreased biomass and root length of cucumber.
Also, NAA significantly decreased cucumber root length and tended to increase
cucumber root dried weight when grown in 100 mg kg-1 of endosulfan
sulfate spiked sand.
acetic acid, Cucumber, Economic crops, Endosulfan sulfate, Phytotoxicity,
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