scholarly journals On the Control of Flowering Time of Paddy Rice Plants by the Action of Light

1930 ◽  
Vol 2 (2) ◽  
pp. 153-160_1 ◽  
Author(s):  
YAKICHI NOGUCHI
Keyword(s):  
Flowering Time ◽  
Paddy Rice ◽  
Rice Plants

scholarly journals Floral Impotency Due to Cool Weather in Paddy Rice plants in the Early-Season Culture Area.

1991 ◽  
Vol 60 (2) ◽  
pp. 225-233 ◽  
Author(s):  
Tomio WATANABE ◽  
Yoshio TAKEICHI
Keyword(s):  
Paddy Rice ◽  
Early Season ◽  
Rice Plants ◽  
Culture Area

scholarly journals OsFPFL4 is Involved in the Root and Flower Development by Affecting Auxin Levels and ROS Accumulation in Rice (Oryza sativa)

Rice ◽  
2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Yaomin Guo ◽  
Qi Wu ◽  
Zizhao Xie ◽  
Bo Yu ◽  
Rongfeng Zeng ◽  
...  
Keyword(s):  
Flowering Time ◽  
Flower Development ◽  
Reverse Genetics ◽  
Plant Root ◽  
Lateral Roots ◽  
Primary Root ◽  
Auxin Biosynthesis ◽  
Wild Type ◽  
Rice Plants ◽  
Ros Homeostasis

Abstract Background FPF1 (flowering-promoting factor 1) is one of the important family involved in the genetic control of flowering time in plant. Until now, limited knowledge concerning FPF1 family in rice has been understood. Results As a homologue of AtFPF1, FPF1-like protein 4 of rice (OsFPFL4) is expressed in various tissues of plants. The functions of OsFPFL4 in rice were investigated by the reverse genetics approaches. Plants overexpressing OsFPFL4 have shorter primary root, more lateral roots and adventitious roots than wild type; however, RNA interference (RNAi) of OsFPFL4 significantly inhibits the growth of root system, and also delays the flowering time in rice. Interestingly, increased or repressed expression of OsFPFL4 leads to shrunken anthers and abnormal pollen grains. It is well recognized that auxin plays important roles in plant root and flower development, and the root elongation is also regulated by reactive oxygen species (ROS) homeostasis. Here, our results show that rice plants overexpressing OsFPFL4 accumulate more auxin in the shoot and root, whereas RNAi lines have less auxin than wild type. As expected, the transcript levels of genes responsible for auxin biosynthesis and polar transport are altered in these OsFPFL4 transgenic plants. As to ROS, slightly higher ROS levels were detected in overexpression root and inflorescence than the counterparts of wild type; however, the ROS levels were significantly increased in the RNAi lines, due to increased expression of ROS-producers and reduced expression of ROS-scavengers. Conclusion Our results reveal that OsFPFL4 is involved in modulating the root and flower development by affecting auxin and ROS homeostasis in rice plants. OsFPFL4 controls auxin accumulation via affecting auxin biosynthesis and transport, and also modulates ROS homeostasis by balancing ROS producing and scavenging. Thus, auxin-mediated ROS production might play a role in regulating redox status, which controls plant root and flower development.

Residual Effects of Unplanted Alleys in Rice Experimental Fields

1973 ◽  
Vol 9 (4) ◽  
pp. 365-367
Author(s):  
Kwanchai A. Gomez ◽  
Sanga Duangratana
Keyword(s):  
The Philippines ◽  
Paddy Rice ◽  
Residual Effects ◽  
Agronomic Characters ◽  
Rice Plants ◽  
Previous Season

SUMMARYResearchers commonly use unplanted alleys to separate plots in experiments with paddy rice. In studies in the Philippines and Thailand we compared the performance of rice plants grown in previously cropped areas of a field with that of plants grown in areas which were unplanted alleys in the previous season. The latter plants had yields and values for several agronomic characters that were significantly different from plants grown in the previously planted areas, with yields ranging from 8 to 25 per cent higher.

Sign in / Sign up

Export Citation Format

Share Document