BACKGROUND Effector proteins of biotrophic plant pathogenic fungi and oomycetes are delivered into host cells and play important roles in both disease development and disease resistance response. How obligate fungal pathogen effectors enter host cells is poorly understood. The Ps87 gene of Puccinia striiformis encodes a protein that is conserved in diverse fungal pathogens. Ps87 homologs from a...

Soybean is the main agricultural crop in Uruguay. One of diseases with greatest damage potential Asian soybean rust, estimated grain yield losses up 80% region. Throughout history, different authors have stated importance genetic resistance as a fundamental tool to decrease adverse effects phytopathogens, leading agriculture sustainability. The objective this work was introduce rust genes into ...

A detached leaf screening technique was developed to evaluate soybean for resistance to powdery mildew (Microsphaera diffusa) at ISU and rust (Phakopsora pachyrhizi) at GXAAS. In powdery mildew, first fully opened trifoliate leaves were collected excising at the base of petiole from three varieties, placed two leaves per 14-cm dia × 2-cm ht sterile Petridish containing a layer of wet wahtman#1 ...

Inoculation of soybean (Glycine max) plants with Phakopsora pachyrhizi, the causal organism of Asian soybean rust, elicits a biphasic response characterized by a burst of differential gene expression in the first 12 h. A quiescent period occurs from 24 to 48 h after inoculation, in which P. pachyrhizi continues to develop but does not elicit strong host responses, followed by a second phase of ...

Asian rust caused by Phakopsora pachirhizi, which is a major constraint to production of soybean, causing 90% yield losses in field. Synthetic fungicides used control this disease are environmentally degrading and have negative impact on the health producers consumers. The use resistant soybean genotypes can be an effective alternative. aim work evaluate tolerance varieties under natural condit...

Asian soybean rust (ASR), triggered by Phakopsora pachyrhizi, can cause great yield losses on and nickel (Ni) has potential to control this disease. This study evaluated the effect of using seeds with different Ni contents ASR performing two experiments. In experiment 1, were obtained spraying plants three times solutions containing either 60 or 100 gNi·ha-1. Plants sprayed water served as trea...