Coming from a low-income heritage language family, like 17% of Latino families, entails important academic risk factors related to lower scores on reading tests. Considering that it is estimated that Latino students will represent 50% of the U.S. public schools’ population by 2050, their literacy learning must be supported adequately. The purpose of this literature review is to explore, from an ecocultural perspective, early literacy practices of low-income Spanish-speaking families and analyze the nature of literacy home-school interventions implemented for this group. The literature highlights non-traditional literacy practices that are strengths of the Latino families, such as a robust oral tradition focused on social cues, children’s engagement in written household chores, and the use of the Bible to pass values. Parents have mixed beliefs regarding literacy promotion: they do not feel prepared to support their children; thus, they support teachers as experts. Three types of home-school literacy interventions were found: printed material sharing; printed material exchange; family programs. As the literature posits, interventions should consider and be based on family beliefs, culture, and strengths; otherwise, effectivity and attrition are at risk. Moreover, new research should be conducted to bridge the gap regarding the role of family actors other than the mother, as well as the differences within the Latino community and immigrant generation.

Based on partial 16S sequences, we previously described a novel group of nonsymbiotic, acetylene reduction activity-positive actinomycetes which were isolated from surface-sterilized roots of Casuarina equisetifolia growing in Mexico. An amplified rRNA restriction analysis confirmed that these actinomycetes are distinct from Frankia, a finding substantiated by a 16S rRNA gene phylogenetic analysis of two of the Mexican isolates. Further support for these actinomycetes being separate from Frankia comes from the very low DNA-DNA homology that was found. Nevertheless, the Mexican isolates may be diazotrophs based not only on their ability to grow in N-free medium and reduce acetylene to ethylene but also on the results from N-15 isotope dilution analysis and the finding that a nifH gene was PCR amplified. A comparison of the nifH sequences from the various isolates showed that they are closely related to nifH from Frankia; the similarity was 84 to 98% depending on the host specificity group. An analysis of complete 16S rRNA gene sequences demonstrated that the two strains analyzed in detail are most closely related to actinobacteria in the Thermomonosporaceae and the Micromonosporaceae.