Effects of a mud snail Cipangopaludina chinensis laeta (Architaenioglossa: Viviparidae) on the abundance of terrestrial arthropods through rice plant development in a paddy field

2016 ◽  
Vol 52 (1) ◽  
pp. 97-106 ◽  
Author(s):  
V. K. Dewi ◽  
S. Sato ◽  
H. Yasuda
Keyword(s):  
Plant Development ◽  
Paddy Field ◽  
Rice Plant ◽  
Terrestrial Arthropods ◽  
Mud Snail

Assessment of a three-stage sampling strategy to investigate the spatial distribution and population density of Aphelenchoides besseyi among Oryza sativa seeds

Nematology ◽  
2010 ◽  
Vol 12 (3) ◽  
pp. 373-380
Author(s):  
Katsumi Togashi ◽  
Shigeru Hoshino
Keyword(s):  
Spatial Distribution ◽  
Oryza Sativa ◽  
Paddy Field ◽  
Rice Plant ◽  
Spatial Scales ◽  
Sampling Strategy ◽  
Paddy Fields ◽  
Nematode Density ◽  
Aphelenchoides Besseyi ◽  
The Mean

AbstractThis study aimed to determine the spatial distribution patterns of Aphelenchoides besseyi among Oryza sativa seeds on panicle, plant hill, and paddy field spatial scales and to present a three-stage sampling method for estimating the mean density per seed in paddy fields. Living and dead nematodes were extracted individually from 20 seeds sampled from each of five panicles, which were sampled from each of six rice plant hills in each of eight paddy fields, where all plants had leaves exhibiting the 'white tip' symptom. Nested ANOVA indicated that A. besseyi density per seed was significantly different among the eight paddy fields, among rice plant hills in paddy fields, and among panicles in rice plant hills. The proportion of nematode-infested seeds (prevalence) increased and reached an upper limit as the mean density per seed on the panicle scale increased, whereas linear relationships were observed between nematode prevalence and the mean density on plant hill and paddy field scales. Relationships between mean density and mean crowding of nematodes per seed indicated that the nematodes exhibited clumped distribution on each of panicle, plant hill and field scales. Using these relationships, a three-stage sampling plan for estimating nematode density per seed at a specified precision level is presented.

scholarly journals Cycling of carbon in a paddy field. III. Organic matter production and solar energy utilization in a rice plant population.

1980 ◽  
Vol 49 (2) ◽  
pp. 232-242 ◽  
Author(s):  
Tohru YAMAGISHI ◽  
Kensuke OKADA ◽  
Tetsuji HAYASHI ◽  
Atsuhiko KUMURA ◽  
Yoshio MURATA
Keyword(s):  
Organic Matter ◽  
Solar Energy ◽  
Paddy Field ◽  
Rice Plant ◽  
Plant Population ◽  
Energy Utilization ◽  
Organic Matter Production ◽  
Matter Production ◽  
Solar Energy Utilization

scholarly journals Spatiotemporal expression profile of novel and known small RNAs throughout rice plant development focussing on seed tissues

BMC Genomics ◽  
2022 ◽  
Vol 23 (1) ◽  
Author(s):  
Anikó Meijer ◽  
Tim De Meyer ◽  
Klaas Vandepoele ◽  
Tina Kyndt
Keyword(s):  
Plant Development ◽  
Early Life ◽  
Small Rnas ◽  
Rice Plant ◽  
Rice Yield ◽  
Small Interfering Rnas ◽  
Yield And Quality ◽  
Spatiotemporal Expression ◽  
Generative Phase ◽  
Generation Sequencing

Abstract Background Small RNAs (sRNAs) regulate numerous plant processes directly related to yield, such as disease resistance and plant growth. To exploit this yield-regulating potential of sRNAs, the sRNA profile of one of the world’s most important staple crops – rice – was investigated throughout plant development using next-generation sequencing. Results Root and leaves were investigated at both the vegetative and generative phase, and early-life sRNA expression was characterized in the embryo and endosperm. This led to the identification of 49,505 novel sRNAs and 5581 tRNA-derived sRNAs (tsRNAs). In all tissues, 24 nt small interfering RNAs (siRNAs) were highly expressed and associated with euchromatic, but not heterochromatic transposable elements. Twenty-one nt siRNAs deriving from genic regions in the endosperm were exceptionally highly expressed, mimicking previously reported expression levels of 24 nt siRNAs in younger endosperm samples. In rice embryos, sRNA content was highly diverse while tsRNAs were underrepresented, possibly due to snoRNA activity. Publicly available mRNA expression and DNA methylation profiles were used to identify putative siRNA targets in embryo and endosperm. These include multiple genes related to the plant hormones gibberellic acid and ethylene, and to seed phytoalexin and iron content. Conclusions This work introduces multiple sRNAs as potential regulators of rice yield and quality, identifying them as possible targets for the continuous search to optimize rice production.

scholarly journals Studies on Water Management in the Ill-drained Paddy Field : V. The effect of surface drainage on the rice plant lodging

1959 ◽  
Vol 28 (1) ◽  
pp. 58-60 ◽  
Author(s):  
Toshiaki KOYAMA ◽  
Akira MIYASAKA ◽  
Takeyasu MUSYA ◽  
Eiji ITO ◽  
Kazuo EGUCHI
Keyword(s):  
Water Management ◽  
Paddy Field ◽  
Rice Plant ◽  
Surface Drainage ◽  
Effect Of Surface

scholarly journals Mechanism of Dwarfing of Rice Plant in Paddy Field Sprayed with Benthiocarb Herbicide

1979 ◽  
Vol 24 (4) ◽  
pp. 272-280
Author(s):  
Tadao YAMADA ◽  
Hideo CHISAKA ◽  
Yutaka KOYAMA ◽  
Yoshio TAKEICHI
Keyword(s):  
Paddy Field ◽  
Rice Plant
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