scholarly journals Studies on Photosynthesis in Rice Plant : (VII) Photosynthesis of rice plants grown under different condition in manuring or plant spacing

1957 ◽  
Vol 26 (2) ◽  
pp. 159-164
Author(s):  
Yoshio MURATA ◽  
Akio OSADA ◽  
Junichiro IYAMA
Keyword(s):  
Rice Plant ◽  
Plant Spacing ◽  
Rice Plants

Changes in release level of momilactone B into the environment from rice throughout its life cycle

2003 ◽  
Vol 30 (9) ◽  
pp. 995 ◽  
Author(s):  
Hisashi Kato-Noguchi ◽  
Takeshi Ino ◽  
Masahiko Ichii
Keyword(s):  
Life Cycle ◽  
Release Rate ◽  
Rice Plant ◽  
Growth Inhibitor ◽  
Rice Plants ◽  
Flowering Initiation ◽  
Single Rice ◽  
Germination And Growth

Momilactone B was released into the neighboring environment from rice throughout its life cycle. The rate of momilactone B release from rice increased until flowering initiation, and then decreased. The release rate of momilactone B at the day of flowering started was 2.1 μg plant–1 d–1. On average, a single rice plant released about 100 μg of momilactone B into the neighboring environment over its life cycle. Since momilactone B is a growth inhibitor, these results suggest that momilactone B released from rice plants may serve as an allelochemical to inhibit the germination and growth of neighboring plants.

scholarly journals Associations of Pantoea with Rice Plants: As Friends or Foes?

Agriculture ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1278
Author(s):  
Febri Doni ◽  
Nurul Shamsinah Mohd Suhaimi ◽  
Budi Irawan ◽  
Zulqarnain Mohamed ◽  
Muhamad Shakirin Mispan
Keyword(s):  
Rice Plant ◽  
Systemic Resistance ◽  
Gram Negative Bacteria ◽  
Emerging Pathogens ◽  
Gram Negative ◽  
Rice Plants ◽  
Plant Interaction ◽  
Microbe Interactions

Pantoea species are gram-negative bacteria from the Enterobacteriaceae family, generally associated with plants, either as epiphytes or as pathogens. In the last decade, Pantoea species are being regarded as re-emerging pathogens that are the causal agents of various diseases in rice plants. Inherently, they are also known to be opportunistic plant symbionts having the capacity to enhance systemic resistance and increase the yield of rice plants. It is unclear how they can express both beneficial and pathogenic traits, and what factors influence and determine the outcome of a particular Pantoea–rice plant interaction. This review aims to compare the characteristics of rice plant-beneficial and pathogenic strains belonging to the Pantoea species and gain new insights, enabling distinction among the two types of plant–microbe interactions.

scholarly journals APPLICATION OF TRAP BARRIER SYSTEM COMBINED WITH CAGE TRAP FOR CONTROLLING RATS IN RICE FIELD

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Hastin Wulan Sekarweni ◽  
Yulia Pujiastuti ◽  
Siti Herlinda
Keyword(s):  
Rice Plant ◽  
Rice Field ◽  
Rice Yield ◽  
Research Area ◽  
Yield Reduction ◽  
Rice Varieties ◽  
Rice Plants ◽  
Number Of Males

Rice-field rat is a main pest of rice. Yield reduction caused by rat is quite high, because rats attack rice plant at all stages. One of the efforts applied to control rats is by using Trap Barrier System combined with cage trap. The objective of this research was to identify species of rat attacking rice plants and investigate the presence of  rat by their footprints. The experiment was conducted in Jalur 6  Village Sumber Mulya, Sub-district  Muara Telang,  District Banyuasin, South  Sumatra. One hectare of farmer’s rice field, divided into 3 sub-plot. Each sub-plot was planted with variety paddy of Inpari 22 (sub-plot A), Inpari 33 (sub-plot B), and Inpari 43 (sub-plot C). The number of cage traps was 6 traps per sub-plot. Observations were made 7 times, with an interval of 10 days. Results showed species of trapped rats in the research area was Rattus argentiventer, in which number of males was higher than females. Morphologically, the size of males were bigger than female. Number of footprints did not reperesentative the number of trapped rats. Inpari 43 variety was more preferred by rats because damage intensity was the highest than other two rice varieties.

SERANGAN DAN POPULASI Scotinophara sp. PADA TANAMAN PADI SAWAH DI KABUPATEN BOLAANG MONGONDOW TIMUR

EUGENIA ◽  
2019 ◽  
Vol 22 (3) ◽  
Author(s):  
Alex Hendra Kila ◽  
Ch. L. Salaki ◽  
Elisabeth R.M. Meray
Keyword(s):  
Population Density ◽  
Rice Plant ◽  
Survey Methods ◽  
Test Site ◽  
Rice Cultivation ◽  
Plant Age ◽  
Vegetative Stage ◽  
Rice Plants ◽  
Generative Phase

ABSTRACT   The research aimed to find out the attacks and pest populations Scotinophara sp. in rice crops have been carried out in EastBolaang Mongondow from July to October 2014. The study used survey methods at several centers of rice cultivation in East Bolaang Mongondow, then set three districts as a test site where sampling. Sampling using Method Diagonal slices then select ten clump of rice plants in each sub-sample plots. Samples were taken at vegetative stage and generative phase. Things were observed in this study is the percentage of infected plants and pest populations. The results showed that the highest percentage of infected rice plants in the age of the plants 8 weeks after plants are found in Sub Tutuyan amounted to 66.66 percent and the lowest sequentially the District Nuangan and the District Kotabunan namely 39.33 percent and 11.13 percent.The highest Scotinophara sp. population density was found based on the location is district Tutuyan 10,11 tail and the lowest sequentially District Nuangan and the District Kotabunan is 1.82 and 0.96 tail. The density of the population by age of the plant, the highest in the plant age 8 mst 12.75 and the lowest sequentially 6, 4 and 2 mst is4.38, 0.06 and 0 tail. Keywords : attack, population, Scotinophara sp., rice plant

scholarly journals Nitrous Oxide Emissions from Paddies: Understanding the Role of Rice Plants

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 180
Author(s):  
Arbindra Timilsina ◽  
Fiston Bizimana ◽  
Bikram Pandey ◽  
Ram Kailash Prasad Yadav ◽  
Wenxu Dong ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Rice Plant ◽  
Soil Microorganisms ◽  
N2o Emission ◽  
Nitrous Oxide Emissions ◽  
Agricultural Activity ◽  
N2o Formation ◽  
Rice Plants ◽  
Potential Source

Paddies are a potential source of anthropogenic nitrous oxide (N2O) emission. In paddies, both the soil and the rice plants emit N2O into the atmosphere. The rice plant in the paddy is considered to act as a channel between the soil and the atmosphere for N2O emission. However, recent studies suggest that plants can also produce N2O, while the mechanism of N2O formation in plants is unknown. Consequently, the rice plant is only regarded as a channel for N2O produced by soil microorganisms. The emission of N2O by aseptically grown plants and the distinct dual isotopocule fingerprint of plant-emitted N2O, as reported by various studies, support the production of N2O in plants. Herein, we propose a potential pathway of N2O formation in the rice plant. In rice plants, N2O might be formed in the mitochondria via the nitrate–nitrite–nitric oxide (NO3–NO2–NO) pathway when the cells experience hypoxic or anoxic stress. The pathway is catalyzed by various enzymes, which have been described. So, N2O emitted from paddies might have two origins, namely soil microorganisms and rice plants. So, regarding rice plants only as a medium to transport the microorganism-produced N2O might be misleading in understanding the role of rice plants in the paddy. As rice cultivation is a major agricultural activity worldwide, not understanding the pathway of N2O formation in rice plants would create more uncertainties in the N2O budget.

scholarly journals Salivary Protein NlSP7 of The Brown Planthopper Functions As An Effector for Mediating Tricin Metabolism in Rice Plants

2021 ◽  
Author(s):  
Gu Gong ◽  
Long-Yu Yuan ◽  
Yi-Feng Li ◽  
Hang-Xiang Xiao ◽  
Yan-Fang Li ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Food Intake ◽  
Rice Plant ◽  
Artificial Diet ◽  
Mrna Level ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Salivary Protein ◽  
Rice Plants ◽  
Important Pest

Abstract The brown planthopper (BPH), Nilaparvata lugens, is an important pest that affects rice (Oryza sativa) production in Asia. The flavone tricin (5,7,4ʹ-trihydroxy-3ʹ,5ʹ-dimethoxy flavone) is a valuable secondary metabolite commonly found in rice plants that can defend rice plants against infestation by BPH. BPH damage can reduce the metabolic level of tricin in rice. Our preliminary transcriptome research results showed that BPH salivary protein 7, NlSP7, is highly responsive to tricin stimuli. However, the function of NlSP7 in mediating the interaction between the rice plant and the BPH is unknown. In this study, we cloned the NlSP7 gene in N. lugens and found that its mRNA level was greater in the presence of high tricin content than low tricin content, regardless of whether the BPHs were fed a rice plant diet or an artificial diet containing 100 mg/L tricin. Knocking down NlSP7 resulted in BPH individuals spending more time in the non-penetration and pathway phase, and less time feeding on the phloem of rice plants. These changes decreased BPH food intake, feeding behavior, and fitness, as well as the tricin content of the rice plants. These findings demonstrate that the salivary protein NlSP7 of BPH functions as an effector for tricin metabolism in rice.

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