Ocurrence of Causing Leaf Spots on Soursop () in Mexico.

Soursop (Annona muricata L: Annonaceae) is a small tropical fruit tree native to South America (Pinto, 2005). The flesh of its fruits is widely used as a main ingredient of pastries, even young fruits are used as a vegetable. In June 2022, leaf spots symptoms were observed on fifty soursop plants in a commercial nursery located in Juan José Ríos (25°45'20"N 108°50'21"W), Ahome, Sinaloa State.

First Report of Causing Powdery Mildew on in Mexico.

, common sow thistle, is native to Europe, Northern Africa, and Western Asia. This plant has become a common weed throughout the world. In Mexico, this weed has become widely naturalized by replacing indigenous plants and invading many agricultural areas.

Potential for sustainable irrigation expansion in a 3 °C warmer climate.

Climate change is expected to affect crop production worldwide, particularly in rain-fed agricultural regions. It is still unknown how irrigation water needs will change in a warmer planet and where freshwater will be locally available to expand irrigation without depleting freshwater resources. Here, we identify the rain-fed cropping systems that hold the greatest potential for investment in irrigation expansion because water will likely be available to suffice irrigation water demand.

First Report of Powdery Mildew on Caused by in Mexico.

(Scrophulariaceae family), commonly known as Texas sage or cenizo, is an evergreen shrub native to southwestern United States and northern Mexico. This plant is commercially sold as a native, drought-tolerant ornamental. During the spring of 2019 and 2020, typical symptoms of powdery mildew were found on cenizo plants growing as ornamentals in urban areas in the municipality of Ahome, Sinaloa, Mexico.

Characterization of Species Associated with Mango Grey Leaf Spot Disease in Sinaloa, Mexico.

Mango is one of the most popular and nutritious fruits in the world and Mexico is the world's largest exporter. There are many diseases that directly affect fruit yield and quality. During the period 2016-2017, leaves with grey leaf spots were collected from 28 commercial mango orchards distributed in two main production areas in Sinaloa State of Mexico, and 50 isolates were obtained.

The Avocado Sunblotch Viroid: An Invisible Foe of Avocado.

This review collects information about the history of avocado and the economically important disease, avocado sunblotch, caused by the avocado sunblotch viroid (ASBVd). Sunblotch symptoms are variable, but the most common in fruits are irregular sunken areas of white, yellow, or reddish color. On severely affected fruits, the sunken areas may become necrotic.

Identification and characterization of superoxide dismutase in Phytophthora cinnamomi.

Superoxide dismutase (SOD) activities of the oomycete Phytophthora cinnamomi were examined. Five polypeptides with manganese superoxide dismutase (MnSOD) activity were found in mycelium growing in liquid culture with relative molecular weights ranging from approximately 25 to 100 kDa. Comparison with characterized avocado SODs showed no evidence for the presence of either iron or copper/zinc SODs in P.

Trichoderma-induced plant immunity likely involves both hormonal- and camalexin-dependent mechanisms in Arabidopsis thaliana and confers resistance against necrotrophic fungi Botrytis cinerea.

Filamentous fungi belonging to the genus Trichoderma have long been recognized as agents for the biocontrol of plant diseases. In this work, we investigated the mechanisms involved in the defense responses of Arabidopsis thaliana seedlings elicited by co-culture with Trichoderma virens and Trichoderma atroviride. Interaction of plant roots with fungal mycelium induced growth and defense responses, indicating that both processes are not inherently antagonist.

[Implications of the Renin-Angiotensin system in diabetic nephropathy].

In the last decades, the incidence of type 2 diabetes has increased alarmingly worldwide including Mexico, and particularly among Mexican-Americans. The etiology of type 2 diabetes is multiple, in which there is a complex interaction between environmental and genetic risk factors. The kidney is a target organ that is damaged when type 2 diabetes occurs.

Auxin stimulates S6 ribosomal protein phosphorylation in maize thereby affecting protein synthesis regulation.

Auxin is known to stimulate protein synthesis in many plant tissues, but the mechanisms involved in this process are unknown. The present research inquires whether auxin might regulate selective translation of mRNAs by inducing S6 ribosomal protein phosphorylation on the 40S ribosomal subunit in maize (Zea mays L.).

Ribonucleoprotein particles of quiescent maize embryonic axes.

Certain RNA molecules are known to be sequestered and stored as ribonucleoprotein particles (RNPs) in many different tissues, particularly at some stages of metabolic quiescence. In this research RNPs from embryonic axes of mature maize seeds were isolated by sucrose and CsCl gradient centrifugation and characterized based on their RNA and protein contents. Two types of RNP particles of non-ribosomal nature were identified by northern blot analysis with specific probes: the 7S RNP and the signal recognition particle (SRP) particles which contain 5S rRNA and 7S RNA respectively.

Synthesis of ribosomal proteins from stored mRNAs early in seed germination.

In several eukaryotic organisms the mRNA expression for ribosomal proteins (RPs) is highly regulated at the translational level. The present work addresses the synthesis of RPs early in germination and particularly the origin of their transcripts. Excised maize axes were labeled with [35S]methionine for 6 h, and both cytoplasmic and ribosomal proteins were analyzed by electrophoresis and fluorography.