Espinosa-García, F. J. y J. Sarukhán. 1997. Manual de malezas del Valle de México. Ediciones Científicas Universitarias UNAM-Fondo de Cultura Económica. México, D.F. 407 pp.

Reseña de libro

FLORA RIPARIA DE LOS RIOS SABINAS Y SAN RODRIGO, COAHUILA, MÉXICO

A floristic study of the riparian vegetation in the rivers Sabinas and San Rodrigo of northern Coahuila, Mexico, is presented. The area was explored and the botanical material herborized and deposited at the ANSM herbarium. A total of 70 families, 193 genera and 243 species were found. The trees in the flora are 9% of all the species, the shrubs 11%, the vines 6%, the aquatic and subaquatic herbs 21.4% and the terrestrial herbs 52.6%.Se presenta un estudio florístico de las especies de la vegetación riparia de los ríos Sabinas y San Rodrigo del norte de Coahuila. Mediante recorridos en el área se colectó material que se herborizó para formar parte de la colección del herbario ANSM. Se identificaron 70 familias, 193 géneros y 243 especies. Las plantas arbóreas representan 9% del total, las arbustivas 11%, las lianas 6%, las herbáceas acuáticas y subacuáticas 21.4% y las herbáceas terrestres 52.6%

FLORA RIPARIA DE LOS RIOS SABINAS Y SAN RODRIGO, COAHUILA, MÉXICO

A floristic study of the riparian vegetation in the rivers Sabinas and San Rodrigo of northern Coahuila, Mexico, is presented. The area was explored and the botanical material herborized and deposited at the ANSM herbarium. A total of 70 families, 193 genera and 243 species were found. The trees in the flora are 9% of all the species, the shrubs 11%, the vines 6%, the aquatic and subaquatic herbs 21.4% and the terrestrial herbs 52.6%.Se presenta un estudio florístico de las especies de la vegetación riparia de los ríos Sabinas y San Rodrigo del norte de Coahuila. Mediante recorridos en el área se colectó material que se herborizó para formar parte de la colección del herbario ANSM. Se identificaron 70 familias, 193 géneros y 243 especies. Las plantas arbóreas representan 9% del total, las arbustivas 11%, las lianas 6%, las herbáceas acuáticas y subacuáticas 21.4% y las herbáceas terrestres 52.6%

Nematicidal Activity of the Endophyte <i>Serratia ureilytica</i> against <i>Nacobbus aberrans</i> in Chili Plants (<i>Capsicum annuum</i> L.) and Identification of Genes Related to Biological Control

The genus Serratia is widely distributed in soil, water, plants, animals, invertebrates, and humans. Some species of this genus have antifungal, antibacterial, and nematicidal activity. In this work, the nematicidal activity of the endophytic strain of Serratia sp. in chili, Capsicum annuum L., is reported, where at a bacterial concentration of 4 × 109 cel/mL, the penetration of nematodes into the roots significantly decreased by 91 and 55% at 7 and 21 days after inoculation. This bacterial concentration also significantly decreased the number of galls, eggs, egg masses and reproduction factor produced by Nacobbus aberrans in Chili plants, with respect to the control where this bacterial strain was not applied. In the analysis of the genome of the strain, based on average nucleotide identity (ANI), the isolate could be affiliated to the species Serratia ureilytica. The size of the genome is 5.4 Mb, with a 59.3% content of GC. Genes related to the synthesis of chitinases, siderophores, proteases C, serralisins, hemolysin, and serrawettin W2 that have been reported for biocontrol of nematodes were identified in the genome. It is the first report of Serratia ureilytica with nematicidal activity. Based on these results of nematicidal activity, this strain can be evaluated in the field as an alternative in the biocontrol of Nacobbus aberrans in chili cultivation