scholarly journals Genetic Diversity of Hydro Priming Effects on Rice Seed Emergence and Subsequent Growth under Different Moisture Conditions

Genes ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 994
Author(s):  
Yoshihiro Nakao ◽  
Chiharu Sone ◽  
Jun-Ichi Sakagami
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Soil Moisture ◽  
Seed Priming ◽  
Oryza Glaberrima ◽  
Rice Seed ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Dry Conditions ◽  
Moisture Conditions

Seed priming refers to seed enhancement methods that stimulate seed metabolism. This study evaluated the genetic diversity of hydro priming efficacy in 27 different genotypes of rice under dry to wet soil moisture conditions. The genotypes included 21 genotypes of Oryza sativa, five genotypes of Oryza glaberrima, and one genotype of NERICA (New Rice for Africa). The treated rice seeds were sown in plastic boxes under four soil moisture conditions (5%, 10%, 15%, and 20% (w/w)). The genotypes were categorized into six groups based on growth parameters using hierarchical cluster analysis. Furthermore, emergence properties were investigated by using principal component analysis based on the mean emergence time of control and primed seeds. Seed priming enhanced growth performance under the moderate dry conditions of 10% and 15% soil moisture. Meanwhile, priming efficacy was low in water stress conditions of 5% and 20% soil moisture. There were wide-ranging genotypic differences of priming efficacy under 20% soil moisture condition. Our findings indicate that the anaerobic-tolerant genotypes tend to exhibit priming efficacy under high soil moisture conditions. Furthermore, one group included all upland genotypes of Oryza sativa. This group originally adapted to 10% and 15% of dry conditions, and seed priming improved their features greatly.

scholarly journals Genetic diversity in maize inbreds under excess soil moisture condition

2017 ◽  
Vol 42 (2) ◽  
pp. 379-385
Author(s):  
M Hoque ◽  
F Akhter ◽  
M Kadir ◽  
S Akhter ◽  
S Ahmed
Keyword(s):  
Genetic Diversity ◽  
Soil Moisture ◽  
Mean Value ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Spad Value ◽  
Cluster Distance ◽  
Ear Height ◽  
Maize Inbreds ◽  
Total Divergence

Genetic diversity study was done in 64 maize inbreds grown under excess soil moisture condition.The genotypes were grouped into eight clusters. It was observed that all intercluster distances were larger than all intracluster distances. Such results indicated that genotypes included within a cluster had less diversity among themselves but wider genetic diversity among the inbreds of different clusters. The highest inter cluster distance was observed between cluster IV & VII followed by IV & V , IV & VIII, II & VII and I & IV. The highest intra cluster distance was noticed in cluster V and the lowest was in cluster VII. The highest yield/plant, cob girth, number of rows/ear, number of grains/plant, SPAD value and number of nodes with brace roots were observed in cluster IV. The lowest mean value for yield/plant yield components and dwarf statured plant were observed in cluster VII. The plant height, ear height,days to 50% tasseling and silking, cob length, cob girth, 100 grain weight and SPAD value contributed considerably to total divergence. The genetically diverged genotypes in these distinct clusters could be used as parents in hybridization program for getting desirable hybrid(s).Bangladesh J. Agril. Res. 42(2): 379-385, June 2017

scholarly journals Effects of stimulant pH, light and soil moisture on Orobanche solmsii seed germination

2016 ◽  
Vol 22 ◽  
pp. 57-62
Author(s):  
Anjana Bista
Keyword(s):  
Soil Moisture ◽  
Seed Germination ◽  
Ph Value ◽  
Continuous Light ◽  
Germination Percentage ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
High Germination ◽  
Alkaline Conditions ◽  
Moisture Conditions

In order to investigate effect of soil moisture, Orobanche seeds were pre-conditioned in three different soil moisture conditions. The germination percentage was found to be highest (48.31%) in normal soil moisture condition and lowest (4.6%) in flooded soil moisture condition. This indicates that Orobanche seeds are unable to survive for a long period in water logged conditions. In response to stimulant pH, Orobanche solmsii seeds showed significantly a high germination percentage (65.27%) at pH value 6.5 and it declined progressively with the increase of acidic and alkaline conditions. However, seeds appeared to be more sensitive to alkaline rather than acidic condition. The study of effect of light showed that exposure of seeds to continuous light during pre and postconditioning period inhibited seed germination. The inhibition was more effective when seeds were exposed to light during post conditioning phase rather than during pre- conditioning phase.ECOPRINT 22: 57-62, 2015

The influence of antecedent soil moisture conditions on the rainfall–runoff threshold value of a roaded catchment used for water harvesting

2013 ◽  
Vol 13 (5) ◽  
pp. 1202-1208
Author(s):  
C. W. Baek ◽  
N. Coles
Keyword(s):  
Soil Moisture ◽  
Rainwater Harvesting ◽  
Threshold Value ◽  
Rainfall Runoff ◽  
Antecedent Soil Moisture ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Antecedent Moisture ◽  
Moisture Conditions ◽  
The Relationship

A roaded catchment (RC) is a representative type of artificial catchment for rainwater harvesting. The rainfall–runoff threshold value of the RC is the main factor which influences the system efficiency and cost. Antecedent soil moisture condition is an important factor which impacts on the determination of the rainfall–runoff threshold value. In this study, rainfall–antecedent soil moisture condition–runoff relationships and the potential efficiency of RCs are presented. Rainfall and runoff data monitored at research sites in Merredin and Mount Barker are used to determine this relationship. Two antecedent moisture criteria; Antecedent Moisture Conditions (AMC) and Average Antecedent Precipitation (AAP) are used to analyse the relationship between previous rainfall and soil moisture for each RC. Monitored results show that AMC is not that suitable to show the relationship between rainfall and antecedent soil moisture condition of the RC in the dryland of Western Australia and it is recommended to use AAP to determine this relationship.

scholarly journals Molecular characterization and genetic diversity of different genotypes of Oryza sativa and Oryza glaberrima

2017 ◽  
Vol 30 ◽  
pp. 48-57 ◽  
Author(s):  
Caijin Chen ◽  
Wenchuang He ◽  
Tondi Yacouba Nassirou ◽  
Athanase Nsabiyumva ◽  
Xilong Dong ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Molecular Characterization ◽  
Oryza Glaberrima

Impact of climate change on soil moisture condition in Nova Scotia

2012 ◽  
Author(s):  
Raheleh Malekian ◽  
Robert Gordon ◽  
Ali Madani ASABE Member ◽  
Seyyed Ebrahim Hashemi
Keyword(s):  
Climate Change ◽  
Soil Moisture ◽  
Nova Scotia ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Impact Of Climate Change

scholarly journals Effect of soil moisture condition on the conversion rate of oxamyl.

1979 ◽  
Vol 27 (3) ◽  
pp. 191-198
Author(s):  
J.H. Smelt ◽  
A. Dekker ◽  
M. Leistra
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Conversion Rate ◽  
Soil Moisture Content ◽  
Loamy Sand ◽  
Clay Loam ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Incubation Experiments ◽  
Wilting Point

The decomposition of oxamyl in four soils under moist conditions was measured in incubation experiments at 15 deg C. Half-lives of oxamyl in soils with moisture tensions of approx. -9.8 X 103 Pa were 13 days in a clay loam, 14 days in a loamy sand, 34 days in a peaty sand and 39 days in a humic loamy sand. The rate of oxamyl decomposition in the clay loam decreased with decreasing soil moisture content down to values for below wilting point. Oxamyl decomposition in the humic loamy sand decreased with decreasing soil moisture content, but increased sharply in the very dry range. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Soil moisture obtained through remote sensing to assess drought events

2020 ◽  
Vol 24 (9) ◽  
pp. 575-580 ◽  
Author(s):  
Tiago de M. Inocêncio ◽  
Alfredo Ribeiro Neto ◽  
Alzira G. S. S. Souza
Keyword(s):  
Climate Change ◽  
Soil Moisture ◽  
Condition Index ◽  
Semiarid Region ◽  
Moisture Index ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Northeast Region ◽  
Promising Tool ◽  
Soil Moisture Index

ABSTRACT The sequence of drought events in the Northeast of Brazil in recent decades raises attention to the importance of studying this phenomenon. The objective of this study was to evaluate the duration and severity of drought events from 1988 to 2018 in hydrographic basins of the state of Pernambuco, Brazil, using two drought indexes: Standardized Soil Moisture Index and Soil Moisture Condition Index, calculated based on data of the Soil Moisture Project of the European Space Agency’s Climate Change Initiative. The duration of the droughts was determined considering the months between their beginning and end, and their severity was based on the area formed in the graph between the curve of the index and the x-axis. The soil moisture database showed to be a promising tool for the analysis and monitoring of drought events in the Northeast region of Brazil, mainly for analysis and monitoring of drought events. The indexes allowed the evaluation of the drought phenomenon over the 30-year period, showing increases from 2012, which were more pronounced in the Semiarid region. The hydrographic basins responded differently to a same event, depending on the climate characteristics of the region in which they are located. Consecutive years with rainfall below the historical mean increased the magnitude of the droughts, as found for the 2012-2017 period, in which the indexes presented delays to return to more favorable values, showing the effect that one drought year has on the following year.

Soil moisture condition and soil nitrogen dynamics in a pure Alnus japonica forest in Korea

2010 ◽  
Vol 7 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Kyung Won Seo ◽  
Su Jin Heo ◽  
Yowhan Son ◽  
Nam Jin Noh ◽  
Sue Kyoung Lee ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Nitrogen ◽  
Nitrogen Dynamics ◽  
Alnus Japonica ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Soil Nitrogen Dynamics
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