Pantoea agglomerans strain E325, a commercially available antagonist for fire blight of apple and pear, was originally selected through screening based on suppression of Erwinia amylovora on flower stigmas, but specific mechanisms of antagonism were unknown. Bacterial modification of pH was evaluated as a possible mechanism by analyzing stigma exudates extracted from 'Gala' apple stigmas. The p...

Front Cover: Similar to a Chinese fairy tale, Xiantao (Peaches planted by immortals) with complementary functions turns into an elixir save lives. Exosomes and hydrogels combine converge related of pro-osteogenesis, osteoclast inhibition, pro-angiogenesis, immunoregulation, neuroregulation, antibiosis, biophysical stimulation the damaged bone tissue. This is reported Jingfeng Li co-workers in a...

Aphids are a major family of plant insect pests. Medicago truncatula and Acyrthosiphon pisum (pea aphid, PA) are model species with a suite of resources available to help dissect the mechanism underlying plant-aphid interactions. A previous study focused on monogenic and relatively strong resistance in M. truncatula to PA and other aphid species. In this study a moderate resistance to PA was ch...

With the recent commercialization of transgenic rootworm-resistant maize with high levels of antibiosis to larval feeding, the biology of western corn rootworm, Diabrotica virgifera virgiferaLeConte, on hosts beyondmaize,Zea maysL., has become an important topic for which data are limited.Larval survivorship andgrowthparametersweremonitoredon the roots of 29plant species comprised of maize, mai...

Signal extracts prepared from culture supernatants of Pseudomonas fluorescens CHA0 and Pseudomonas aeruginosa PAO stimulated GacA-dependent expression of small RNAs and hence of antibiotic compounds in both hosts. Pseudomonas corrugata LMG2172 and P. fluorescens SBW25 also produced signal molecules stimulating GacA-controlled antibiotic synthesis in strain CHA0, illustrating a novel, N-acyl-hom...

background & aim: despite valuable medicinal properties of safflower, breeding new varieties and development of the crop culture area has been limited due to the lack of genetic variation for some crucial characteristics as resistance to diseases and pests like safflower fly. in this study, populations of wild safflower, c. oxyacanthus were collected from western, central and southern regio...

A common test for the presence of toxic organic substances in plant tissues, and therefore of the potential role of antibiosis (specifically allelopathy) in native plant cozmmunities, has been to apply a water extract of the tissues in germination tests of cultivated annuals. The observed osmotic pressure of the extracts can be high, and sucrose solutions of similar osmotic pressure result in a...