Abiotic stress

Variation in cassava germplasm for tolerance to post-harvest physiological deterioration

M. T. Venturini, Santos, L. R., Vildoso, C. I. A., Santos, V. S., Oliveira, E. J., Venturini, M. T., Santos, L. R., Vildoso, C. I. A., Santos, V. S., and Oliveira, E. J., Variation in cassava germplasm for tolerance to post-harvest physiological deterioration, vol. 15, p. -, 2016.

Tolerant varieties can effectively control post-harvest physiological deterioration (PPD) of cassava, although knowledge on the genetic variability and inheritance of this trait is needed. The objective of this study was to estimate genetic parameters and identify sources of tolerance to PPD and their stability in cassava accessions. Roots from 418 cassava accessions, grown in four independent experiments, were evaluated for PPD tolerance 0, 2, 5, and 10 days post-harvest. Data were transformed into area under the PPD-progress curve (AUP-PPD) to quantify tolerance.

Screening of inbred popcorn lines for tolerance to low phosphorus

O. J. A. P. Santos, Gonçalves, L. S. A., Scapim, C. A., de Sousa, deS. M., Castro, C. R., Baba, V. Y., de Oliveira, A. L. M., Santos, O. J. A. P., Gonçalves, L. S. A., Scapim, C. A., de Sousa, deS. M., Castro, C. R., Baba, V. Y., and de Oliveira, A. L. M., Screening of inbred popcorn lines for tolerance to low phosphorus, vol. 15, p. -, 2016.

Increasing phosphorus use efficiency in agriculture is essential for sustainable food production. Thus, the aims of this study were: i) to identify phosphorus use efficiency (PUE) in popcorn lines during the early plant stages, ii) to study the relationship between traits correlated with PUE, and iii) to analyze genetic diversity among lines. To accomplish this, 35 popcorn lines from Universidade Estadual de Maringá breeding program were studied.

Expression of an alfalfa (Medicago sativa L.) peroxidase gene in transgenic Arabidopsis thaliana enhances resistance to NaCl and H2O2

K. Teng, Xiao, G. Z., Guo, W. E., Yuan, J. B., Li, J., Chao, Y. H., Han, L. B., Teng, K., Xiao, G. Z., Guo, W. E., Yuan, J. B., Li, J., Chao, Y. H., and Han, L. B., Expression of an alfalfa (Medicago sativa L.) peroxidase gene in transgenic Arabidopsis thaliana enhances resistance to NaCl and H2O2, vol. 15, p. -, 2016.

Peroxidases (PODs) are enzymes that play important roles in catalyzing the reduction of H2O2 and the oxidation of various substrates. They function in many different and important biological processes, such as defense mechanisms, immune responses, and pathogeny. The POD genes have been cloned and identified in many plants, but their function in alfalfa (Medicago sativa L.) is not known, to date. Based on the POD gene sequence (GenBank accession No. L36157.1), we cloned the POD gene in alfalfa, which was named MsPOD.

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