Difference in Physiological Responses to Environmental Stress in Protox Inhibitor Herbicide-Resistant Transgenic Rice and Non-transgenic Rice
2012
Yun, Y.B., Sunchon National University, Sunchon, Republic of Korea | Kwon, O.D., Jeonnam Agricultural Research and Extension Service, Naju, Republic of Korea | Shin, D.Y., Sunchon National University, Sunchon, Republic of Korea | Hyun, K.H., Sunchon National University, Sunchon, Republic of Korea | Lee, D.J., Sunchon National University, Sunchon, Republic of Korea | Jung, H.I., Cornell University, NY, Ithaca, USA | Kuk, Y.I., Sunchon National University, Sunchon, Republic of Korea
The objective of this research was to confirm the difference in physiological responses to environmental stresses such as chilling, high temperature, NaCl, and chemical stress (paraquat) in Protox inhibitor resistant-transgenic rice (MX, PX, and AP37) and its non-transgenic counterpart (WT). Transgenic and non-transgenic rice plants were exposed to a chilling temperature of 5℃ for 1 day or a high temperature of 45℃ for 4 days and allowed to recover at 25℃ for 6 days after the chilling treatment or 8 days after the high temperature treatment. Leaf injury, shoot fresh weight, porphyrin biosynthesis substances, and chlorophyll content were investigated in transgenic and non-transgenic rice at 6 days after 0.5% and 1% NaCl treatments or at 5 days after 0~300 μM paraquat treatments. No significant difference in leaf injury and shoot fresh weight were observed between transgenic and non-transgenic rice during chilling and recovery. Plant height and shoot fresh weight were also similar between transgenic and non-transgenic rice during the high temperature and recovery period (0~5 days). However, plant height and shoot fresh weight in transgenic rice line MX and PX were lower than in non-transgenic rice at 6 days for recovery. Leaf injury, chlorophyll, and Mg-Proto IX ME contents had no significant difference between transgenic rice and non-transgenic rice after NaCl treatment, but Proto IX content for AP37 and shoot fresh weight for PX and AP37 in 0.5% NaCl treatment were significantly reduced compared with non-transgenic rice. There was no difference in leaf injury and shoot fresh weight when comparing transgenic rice and non-transgenic rice after paraquat treatment. Although transgenic rice and non-transgenic rice showed a little difference at a particular measurement period in certain environmental stresses, there was generally no difference in physiological responses between transgenic rice and non-transgenic rice.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Korea Agricultural Science Digital Library