TAILIEUCHUNG - Effects of isochronal exogenously applied synthetic GA3, fungal gibberellic acid and red light on the sheath length of the second leaf of Oryza sativa L.cv. Tan ginbozu

The effects of isochronal exogenously applied synthetic-GA3, fungal-gibberellic acid and different light on the sheath length of the second leaf of Oryza sativa were determined under controlled environmental conditions. | Turk J Biol 25 (2001) 45-50 © T†BÜTAK Effects of Isochronal Exogenously Applied Synthetic-GA3, Fungal-Gibberellic Acid and Red Light on the Sheath Length of the Second Leaf of Oryza Sativa . Tan-ginbozu Þ. Fatih TOP‚UOÚLU University of Akdeniz, Art and Science Faculty, Department of Biology, 07058, Antalya - TURKEY Serpil †NYAYAR University of Mersin, Art and Science Faculty, Department of Biology, 33342 Mersin - TURKEY Received: Abstract : The effects of isochronal exogenously applied synthetic-GA3, fungal-gibberellic acid and different light on the sheath length of the second leaf of Oryza sativa were determined under controlled environmental conditions. Our results showed that the effect of fungal-gibberellic acid on the sheath length of the second leaf is higher than that on the control groups (group of 1/2N Hoagland culture solution and group of 1/2N Hoagland culture solution+methanol); however, synthetic-GA3 was more effective on the length of the second leaf than fungal gibberellic acid. Moreover, it was identified that the effect of red light is higher than that of fluorescent light on the growth of the second leaf. Our study has shown that red light and exogenously applied GA3 together have synergistic or supplemental effects on the sheath lengths of the second leaf of dwarf rice Tan-ginbozu. Key Words: Dwarf rice, sheath lengths of second leaf, gibberellin (GA3), light Introduction Plants sense differences in light conditions in their growth environment. This fact shows that photosynthetic organisms adapt themselves to light. Light controls the plant's structural development or morphogenesis. The control of morphogenesis by light is called photomorphogenesis (1,2). There are photoreceptors known to affect photomorphogenesis in plants. One of the well known photoreceptors is phytochrome and it absorbs mostly strong red and far-red light. Cryptochrome is another photoreceptor, an unidentified pigment that absorbs blue .

• Sinh học
• Dwarf rice
• Sheath lengths of second leaf
• Isochronal exogenously
• Synthetic GA3
• Fungal gibberellic acid
• Oryza sativa L
• cv
• Tan ginbozu
• Red rice
• Grain yield
• Ratnagiri 7 Red Kernel
• High yielding rice variety
• Short bold grain type
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