Photothermal zoning of castor (Ricinus communis L.) growing season in the semi-arid Mediterranean area

2019 ◽  
Vol 142 ◽  
pp. 111837 ◽  
Author(s):  
Cristina Patanè ◽  
Salvatore Luciano Cosentino ◽  
Sebastiano Andrea Corinzia ◽  
Giorgio Testa ◽  
Orazio Sortino ◽  
...  
Keyword(s):  
Ricinus Communis ◽  
Growing Season ◽  
Mediterranean Area ◽  
Ricinus Communis L ◽  
Semi Arid

scholarly journals MICORRIZAS ARBUSCULARES E MAMONEIRA (RICINUS COMMUNIS L.): 2. CULTIVO DE SEQUEIRO NO SEMIÁRIDO / ARBUSCULAR MYCORRHIZAE AND RICINUS COMMUNIS L.: 2. DRYLAND CULTIVATION IN THE SEMI-ARID

2020 ◽  
Vol 6 (12) ◽  
pp. 98964-98976
Author(s):  
Camila Maria da Silva ◽  
Patrícia Barbosa da Silva ◽  
Karinne de Albuquerque Camposdo Prado ◽  
Claudemiro de Lima Junior ◽  
Regina Lúcia Félix de Aguiar Lima
Keyword(s):  
Arbuscular Mycorrhizae ◽  
Ricinus Communis ◽  
Ricinus Communis L ◽  
Semi Arid

scholarly journals Selectivity of Pre and Postemergence Herbicides in Single or Combined Applications in Castor Crop

Agronomy ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 19
Author(s):  
Augusto G. F. Costa ◽  
Valdinei Sofiatti ◽  
Cleber D. G. Maciel ◽  
Jalmi G. Freitas ◽  
Gleibson D. Cardoso ◽  
...  
Keyword(s):  
Weed Management ◽  
Arid Region ◽  
Field Experiments ◽  
Ricinus Communis ◽  
Northeast Brazil ◽  
Ricinus Communis L ◽  
Chlorimuron Ethyl ◽  
Semi Arid Region ◽  
Postemergence Herbicides ◽  
Semi Arid

One of the main challenges in castor crop (Ricinus communis L.) production is efficient weed management mainly due to limited options of selective herbicides. This study evaluated the selectivity of herbicides applied alone or in combination in pre- and postemergence applications in castor crop. Two field experiments were carried out under irrigation conditions in a semi-arid region of Northeast Brazil. It was found that the visual symptoms of phytointoxication of the herbicides used on castor were mild in both experiments. Consequently, there were no significant interferences on plant height, number of racemes, and grain (seed) yield. Pre-emergence applications (g ha−1) of trifluralin (1800), pendimethalin (1500), clomazone (750), clomazone + trifluralin (750 + 1800), and clomazone + pendimethalin (750 + 1500) followed by chlorimuron-ethyl in postemergence (15 g ha−1) are selective to castor. The application (g ha−1) of pendimethalin + clomazone (1000 + 500) in pre-emergence, associated with chlorimuron-ethyl (10 and 15), metamitron (2800 and 4200), ethoxysulfuron (60 and 80), or halosulfuron-methyl (75 and 112.5) in one or two applications in postemergence, as single or split applications, in an interval of 14 days, are selective to castor crop.

Comparison of new castor (Ricinus communis L.) genotypes in the mediterranean area and possible valorization of residual biomass for insect rearing

2017 ◽  
Vol 107 ◽  
pp. 581-587 ◽  
Author(s):  
Federica Zanetti ◽  
Camilla Chieco ◽  
Efthymia Alexopoulou ◽  
Angela Vecchi ◽  
Giampaolo Bertazza ◽  
...  
Keyword(s):  
Ricinus Communis ◽  
Mediterranean Area ◽  
Residual Biomass ◽  
Insect Rearing ◽  
Ricinus Communis L ◽  
The Mediterranean

scholarly journals Photosynthetic capacity and water use efficiency in Ricinus communis (L.) under drought stress in semi-humid and semi-arid areas

2017 ◽  
Vol 89 (4) ◽  
pp. 3015-3029 ◽  
Author(s):  
CLAUDIANA M. DOS SANTOS ◽  
LAURÍCIO ENDRES ◽  
VILMA M. FERREIRA ◽  
JOSÉ V. SILVA ◽  
EDUARDO V. ROLIM ◽  
...  
Keyword(s):  
Drought Stress ◽  
Water Use Efficiency ◽  
Water Use ◽  
Photosynthetic Capacity ◽  
Ricinus Communis ◽  
Arid Areas ◽  
Ricinus Communis L ◽  
Use Efficiency ◽  
Semi Arid

scholarly journals Probing the floral developmental stages, bisexuality and sex reversions in castor (Ricinus communis L.)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sujatha Thankeswaran Parvathy ◽  
Amala Joseph Prabakaran ◽  
Thadakamalla Jayakrishna
Keyword(s):  
Developmental Stages ◽  
Ricinus Communis ◽  
Sex Expression ◽  
Pistil Abortion ◽  
Ricinus Communis L ◽  
Sex Reversion ◽  
Stage 4 ◽  
Meristem Development ◽  
Male Specific ◽  
First Time

AbstractCastor (Ricinus communis L) is an ideal model species for sex mechanism studies in monoecious angiosperms, due to wide variations in sex expression. Sex reversion to monoecy in pistillate lines, along with labile sex expression, negatively influences hybrid seed purity. The study focuses on understanding the mechanisms of unisexual flower development, sex reversions and sex variations in castor, using various genotypes with distinct sex expression pattern. Male and female flowers had 8 and 12 developmental stages respectively, were morphologically similar till stage 4, with an intermediate bisexual state and were intermediate between type 1 and type 2 flowers. Pistil abortion was earlier than stamen inhibition. Sex alterations occurred at floral and inflorescence level. While sex-reversion was unidirectional towards maleness via bisexual stage, at high day temperatures (Tmax > 38 °C), femaleness was restored with subsequent drop in temperatures. Temperature existing for 2–3 weeks during floral meristem development, influences sexuality of the flower. We report for first time that unisexuality is preceded by bisexuality in castor flowers which alters with genotype and temperature, and sex reversions as well as high sexual polymorphisms in castor are due to alterations in floral developmental pathways. Differentially expressed (male-abundant or male-specific) genes Short chain dehydrogenase reductase 2a (SDR) and WUSCHEL are possibly involved in sex determination of castor.

scholarly journals The root endophytic bacterial community of Ricinus communis L. resembles the seeds community more than the rhizosphere bacteria independent of soil water content

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Stephanie E. Hereira-Pacheco ◽  
Yendi E. Navarro-Noya ◽  
Luc Dendooven
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Plant Development ◽  
Bacterial Community Structure ◽  
Ricinus Communis ◽  
Ricinus Communis L ◽  
Endophytic Bacterial Community

AbstractRhizosphere and root endophytic bacteria are crucial for plant development, but the question remains if their composition is similar and how environmental conditions, such as water content, affect their resemblance. Ricinus communis L., a highly drought resistant plant, was used to study how varying soil water content affected the bacterial community in uncultivated, non-rhizosphere and rhizosphere soil, and in its roots. Additionally, the bacterial community structure was determined in the seeds of R. communis at the onset of the experiment. Plants were cultivated in soil at three different watering regimes, i.e. 50% water holding capacity (WHC) or adjusted to 50% WHC every two weeks or every month. Reducing the soil water content strongly reduced plant and root dry biomass and plant development, but had little effect on the bacterial community structure. The bacterial community structure was affected significantly by cultivation of R. communis and showed large variations over time. After 6 months, the root endophytic bacterial community resembled that in the seeds more than in the rhizosphere. It was found that water content had only a limited effect on the bacterial community structure and the different bacterial groups, but R. communis affected the bacterial community profoundly.

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