Effects of temperature, light regime and substrates on the production and germination of Stenocarpella maydis pycnidiospores

Júnior, Paulo Roberto Kuhnem; Casa, Ricardo Trezzi; Bogo, Amauri; Agostineto, Lenita; Bolzan, Jonathan Marcel; Miqueluti, David José

doi:10.4025/actasciagron.v34i1.10747

Cited by 4 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These effects are directly related to the level of infection, triggering damage to the infected seeds, as observed in the treatments with potentials P3 and P4. But it is important to consider that isolate, genotypes and environmental conditions such as light and temperature can influence all variables studied (Kuhnem et al, 2012;Casa et al, 2007). According to Araújo et al (2006), the inoculum potential should not be used as one factor to determine the healthy quality of the seed and one should take into consideration factors related to the environment and the intrinsic factors to biology of host and pathogen.…”

Section: Effects Of S Maydis In Initial Performance Of Corn Seedlingsmentioning

confidence: 99%

“…In assessing the speed of emergence index (Figure 4), initial stand ( Figures 5A and B), and final stand ( Figures 5C and D) and dry weight ( Figures 6A and B (Casa et al, 2007) and 28 °C ideal to produce pycnidia (Kuhnem et al, 2012). Seeds with low SEI, when taken to the fi eld, may have slower emergence, allowing the action of other factors and impairment of stand establishment.…”

Section: Effects Of S Maydis In Initial Performance Of Corn Seedlingsmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Stenocarpella maydis in seeds and in the initial development of corn

Siqueira

Barrocas²,

Machado

et al. 2014

J. Seed Sci.

View full text Add to dashboard Cite

-The association of the fungus Stenocarpella maydis with corn seed may cause a reduction of seed germination and vigor of the emerged seedlings. This work was carried out in order to evaluate the effects of S. maydis on corn seed quality as well as on its early development. To evaluate such effects, seeds of cultivars RB9308YG (C1) and RB9108 (C2) were inoculated by the osmotic conditioner technique with two S. maydis isolates for 24(P1), 48(P2), 72(P3) and 96 hours (P4). Plants were grown in a room chamber at 20 °C and 25 °C and daily assessed until 28 days after emergence. Seed germination, incidence of S maydis, electrical conductivity, speed of emergence index (SEI), initial and final seedling population and dry weight of emerged plants, were assessed. The longer the exposition times of the seeds to the fungal colony, the more severe negative effects of the pathogens on seed vigor were observed. S. maydis caused reduced seed vigor in the speed of seedling emergence in the final stand and early development of corn seedlings.

show abstract

Section: Effects Of S Maydis In Initial Performance Of Corn Seedlingsmentioning

confidence: 99%

Section: Effects Of S Maydis In Initial Performance Of Corn Seedlingsmentioning

confidence: 99%

Effects of Stenocarpella maydis in seeds and in the initial development of corn

Siqueira

Barrocas²,

Machado

et al. 2014

J. Seed Sci.

View full text Add to dashboard Cite

show abstract

“…The continuous light also stimulated sporulation in Corynespora cassiicola, while in total darkness the fungus presented low spore production (Celoto et al, 2015). Kuhnem Júnior et al (2012) concluded that the luminosity was fundamental for spore production of Stenocarpella maydis (Berk.) Sutton.…”

Section: Discussionmentioning

confidence: 99%

Culture Medium, Light Regime and Temperature Affect the Development of Sirosporium diffusum

Poletto¹,

Muniz²,

Fantinel³

et al. 2018

JAS

View full text Add to dashboard Cite

Sirosporium diffusum is the causal agent of the brown leaf spot disease on pecan trees that seriously damages the foliage of adult plants and seedlings. This fungal species is difficult to grow satisfactorily in a culture medium. Therefore, the aim of this study was to evaluate the effects of different physical conditions on the development of S. diffusum. In the first assay, eight culture media and five light regimes were combined, while in the second, the three treatments that promoted highest sporulation were combined with three temperatures. The trials were conducted in a two-factorial arrangement in a fully randomized design with six replicates. V8, V8CaCO 3, and CA media under a 24-h photoperiod produced the highest respective sporulations: 29 × 10 4 , 35 × 10 4 , and 41 × 10 4 conidia ml -1. The best temperature for sporulation was 20±1 °C for all culture media, especially V8CaCO 3 and CA. The best artificial conditions for obtaining good mycelial growth and sporulation consisted of a photoperiod of 24 h, temperature of 20±1 °C and V8CaCO 3 or CA culture medium.

show abstract

Survival of Stenocarpella maydis on Corn Residue in Indiana

Luna¹,

Camberato²,

Wise

2017

Plant Health Progress

View full text Add to dashboard Cite

Diplodia ear rot (DER), caused by the fungus Stenocarpella maydis, has become a prevalent corn disease in the Midwest. The survival of S. maydis on corn kernels and stalks was evaluated in Tippecanoe, Co., Indiana, over 17 months. Infested corn residue was either left on the soil surface or buried at 10 or 20 cm. Survival of S. maydis was determined by observing the presence of pycnidia per unit of corn residue under a stereomicroscope and by assessing conidia viability by evaluating germination. Months of environmental exposure and soil depth affected S. maydis survival. Pycnidia production and conidia germination were observed up to 11 months on corn kernels and 17 months on corn stalks when left on the soil surface. Minimal or no conidia germination of S. maydis was observed on residue recovered from 10 or 20 cm after 4 months on kernels and 7 months on stalks. These results demonstrate that surface corn residue can be a long-term source of inoculum and at least two years of rotation to a nonhost crop or residue removal through tillage may be necessary to reduce potential initial inoculum.

show abstract

Effects of temperature, light regime and substrates on the production and germination of Stenocarpella maydis pycnidiospores

Cited by 4 publications

References 17 publications

Effects of Stenocarpella maydis in seeds and in the initial development of corn

Effects of Stenocarpella maydis in seeds and in the initial development of corn

Culture Medium, Light Regime and Temperature Affect the Development of Sirosporium diffusum

Survival of Stenocarpella maydis on Corn Residue in Indiana

Contact Info

Product

Resources

About