scholarly journals Relationship between Root Respiration and Silica:Calcium Ratio and Ammonium Concentration in Bleeding Sap from Stem in Rice Plants during the Ripening Stage.

1995 ◽  
Vol 64 (3) ◽  
pp. 529-536 ◽  
Author(s):  
Takeshi YAMAGUCHI ◽  
Yukindo TSUNO ◽  
Junichi NAKANO ◽  
Reiko MANO
Keyword(s):  
Root Respiration ◽  
Ammonium Concentration ◽  
Ripening Stage ◽  
Rice Plants

Effects of chronic ozone exposure on growth, root respiration and nutrient uptake of rice plants

1991 ◽  
Vol 74 (2) ◽  
pp. 149-164 ◽  
Author(s):  
Isamu Nouchi ◽  
Osamu Ito ◽  
Yoshinobu Harazono ◽  
Kazuhiko Kobayashi
Keyword(s):  
Nutrient Uptake ◽  
Root Respiration ◽  
Ozone Exposure ◽  
Rice Plants

scholarly journals Effect of Nitrogen Application and Leaf Removal on the Metabolism of Carbohydrate in Leaves and Stems of Rice Plants at Ripening Stage.

1998 ◽  
Vol 67 (1) ◽  
pp. 94-100 ◽  
Author(s):  
Mitsugu HIRANO ◽  
Yuko HOSAKA ◽  
Mihoko SUGIYAMA ◽  
Eiki KURODA ◽  
Takao MURATA
Keyword(s):  
Leaf Removal ◽  
Nitrogen Application ◽  
Ripening Stage ◽  
Rice Plants

scholarly journals Photosynthetic enhancement, lifespan extension, and leaf area enlargement in flag leaves increased the yield of transgenic rice plants overproducing Rubisco under sufficient N fertilization

2021 ◽  
Author(s):  
Marin Tanaka ◽  
Mamoru Keira ◽  
Dong-Kyung Yoon ◽  
Tadahiko Mae ◽  
Hiroyuki Ishida ◽  
...  
Keyword(s):  
Leaf Area ◽  
Transgenic Rice ◽  
Photosynthetic Capacity ◽  
N Fertilization ◽  
Ripening Stage ◽  
Wild Type ◽  
Flag Leaves ◽  
Grain Yields ◽  
Rice Plants ◽  
Early Ripening

Abstract Background: Improvement in photosynthesis is one of the most promising approaches to increase grain yields in crop plants. In our previous research using an isolated experimental paddy field, transgenic rice plants overproducing Rubisco by 30% (RBCS-sense rice plants) showed up to 28% increase in grain yields under sufficient nitrogen (N) fertilization. Furthermore, the plant N contents above-ground sections and Rubisco contents of the flag leaves were higher in the RBCS-sense rice plants than the wild-type rice plants during the ripening period, which may be reasons for the increased yields.Result: In this research, the photosynthetic capacity and canopy architecture were analyzed to explore factors for the increased yields of RBCS-sense rice plants. It was found that N had already been preferentially distributed into the flag leaves at the early ripening stage, contributing to maintaining higher Rubisco content levels in the enlarged flag leaves and extending the lifespan of the flag leaves of RBCS-sense rice plants throughout ripening periods under sufficient N fertilization. The higher amounts of Rubisco also improved the photosynthetic activity in the flag leaves throughout the ripening period. Although the enlarged flag leaves of the RBCS-sense rice plants occupied large spatial areas of the uppermost layer in the canopy, no significant prevention of light penetration to leaves below the flag leaves was observed. Additionally, since the CO2 assimilation rates of lower leaves between wild-type and RBCS-sense rice plants were the same at the early ripening stage, the lower leaves did not contribute to an increase in yields between the two genotypes.Conclusion: It was concluded that improvements in the photosynthetic capacity by higher leaf N and Rubisco contents, enlarged the leaf area, and extended the lifespan of flag leaves, causing an increase in grain yields of RBCS-sense rice plants grown under sufficient N fertilization.

scholarly journals Rooting System of Rice Cultivated under System of Rice Intensification (SRI) Method which Improving Rice Yield

2018 ◽  
Vol 25 (2) ◽  
pp. 63
Author(s):  
Nurul Hidayati ◽  
Triadiati Triadiati ◽  
Iswandi Anas
Keyword(s):  
Conventional Method ◽  
Root Respiration ◽  
Rice Yield ◽  
Root Hairs ◽  
Plant Roots ◽  
System Of Rice Intensification ◽  
Aerenchyma Formation ◽  
Rice Plants ◽  
Rice Roots ◽  
Rice Intensification

The development of plant roots is known to play a very important role in the uptake of water and nutrients by rice plants. However, there are few studies on what changes, if any, are induced in the rooting systems of rice plants under System of Rice Intensification (SRI) management. This research evaluated changes of rice roots with SRI method compared to conventional method of irrigated rice cultivation and assessed influences that could improve rice yield. Under SRI management, plant roots were significantly longer and heavier than with conventional method. SRI method also increased the number of root hairs by 60%, and root hairs were healthier and more vigorous compared with conventional method. However, root respiration was not different in the two methods. There was less formation of aerenchyma (air pockets) in rice roots with SRI method, as both the number and size of root aerenchyma were lower with SRI than with conventional method. The SRI method was able to improve the root length, root dry weight compared to the conventional method. The SRI method was also able to increase the number of root hairs by 60% compared with the conventional method. Eh measurements in the soil with SRI method were higher than with conventional method. However, there was no significant different in root respiration. The aerenchyma formation of rice roots in SRI method was lower than conventional method.

Regulation of plastid photosynthetic psbK-I-D-C gene expression by light in rice plants

1995 ◽  
Vol 93 (4) ◽  
pp. 617-623 ◽  
Author(s):  
Shu-Chen Grace Chen ◽  
Sang-Pin Wu ◽  
Pang-Kuo Lo ◽  
Dir-Pu Mon ◽  
Long-Fang Oliver Chen
Keyword(s):  
Gene Expression ◽  
Rice Plants

Metabolism of Mepronil (Basitac®) in Rice Plants

1981 ◽  
Vol 6 (3) ◽  
pp. 347-349 ◽  
Author(s):  
Takashi YUMITA ◽  
Akinori SHOJI ◽  
Izuru YAMAMOTO
Keyword(s):  
Rice Plants
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