Distribution of Assimilates to Each Organ in Rice Plants Exposed to a Low Temperature at the Ripening Stage, and the Effect of Brassinolide on the Distribution

2001 ◽  
Vol 4 (2) ◽  
pp. 136-144 ◽  
Author(s):  
Seiichi Fujii ◽  
Hitoshi Saka
Keyword(s):  
Low Temperature ◽  
Ripening Stage ◽  
Rice Plants

Wheat Catalase Expressed in Transgenic Rice Plants Can Improve Tolerance Against Low Temperature Injury

2002 ◽  
pp. 277-287
Author(s):  
Takeshi Matsumuraa ◽  
Noriko Tabayashib ◽  
Yasuyo Kamagata ◽  
Chihiro Souma ◽  
Haruo Saruyama
Keyword(s):  
Low Temperature ◽  
Transgenic Rice ◽  
Rice Plants ◽  
Transgenic Rice Plants

Laboratory culture of the rice gall midge Pachydiplosis oryzae (Wood-Mason)

1969 ◽  
Vol 58 (3) ◽  
pp. 439-454 ◽  
Author(s):  
Nalini Perera ◽  
Henry E. Fernando
Keyword(s):  
Relative Humidity ◽  
Low Temperature ◽  
Gall Midge ◽  
Normal Activity ◽  
Laboratory Culture ◽  
Rice Plants ◽  
Rice Gall Midge ◽  
Mist Chamber ◽  
Gravid Females ◽  
Very High

No method has so far been available for the laboratory culture of Pachydiplosis oryzae Wood-Mason or for the controlled infestation of rice plants with this pest. Suitable techniques for the above have been developed and are described.For the laboratory culture of P. oryzae, exposure of rice seedlings to gravid females for oviposition and the subsequent maintenance of the plants at a very high humidity in a mist chamber gave high infestation rates but results were not consistent. But this method is suitable for the maintenance of a laboratory culture of this insect.A special oviposition tube was developed for inducing oviposition on limited areas of muslin, and this permitted easy observation, collection and handling of eggs.It was found that oviposition tended to occur most frequently between 1900 and 2200 hr. and that the midges most commonly laid 200–285 eggs.Eggs developed normally and hatched after seventy-two hours when the muslin carrying them was kept on barely moist filter paper in petri dishes.Sixty-hour-old eggs could be stored for up to five days at 80 ± 2°C. with the percentage hatch decreasing gradually from the first to the fifth day. Low temperature affected development and hatching of thirty-six-hour-old eggs more severely, and hatching was completely inhibited if eggs of this age were exposed to this low temperature for more than two days. Hatching was normal when eggs were maintained at relative humidities of and above 88.8 per cent., but below this level some eggs collapsed as a result of desiccation. At relative humidities below 94.8 per cent., larval movement was initially limited and thereafter inhibited and the larvae were contracted. Such larvae resumed normal activity on immersion in water. These immobilised larvae, obtained by exposure of fully developed eggs to a relative humidity in the range 92.9–94.8 per cent., could be revived by immersion in water and used for infesting paddy plants.Fully developed eggs, freshly hatched larvae and larvae subjected to relative humidities in the range 92.9–94.8 per cent. and subsequently revived, were transferred to rica plants bt spraying, or by pipetting on the leaf at the ligules or by pipetting on to the soil at the bases of plants. All these mathods proved successful but pipetting on to the soil between rows of plants was the simplest and is to be preferred for controlled infestation of plants.A very high relative humidity and wet plant surfaces as obtained in the mist chamber used in these studies were essential for successful infestation of rice plants by the gall midge larvae.

scholarly journals Effects of Elevated CO2 on Floral Sterility of Rice Plants Caused by Low Temperature

2005 ◽  
Vol 60 (5) ◽  
pp. 589-592 ◽  
Author(s):  
Masumi OKADA ◽  
Hiroyuki SHIMONO ◽  
Yasuhiro YAMAKAWA ◽  
Meguru INOUE ◽  
Kazuhiko KOBAYASHI
Keyword(s):  
Low Temperature ◽  
Rice Plants
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