Abstract Detail

Recent Topics Posters

Monzalvo-López, René Josué [1], Rewicz, Agnieszka [2], Adamowski, Wojciech [3], Escorcia-Guerrero, Diana Lizbeth  [4], García-Montes , Mario Adolfo  [5], Manríquez-Morán, Norma Leticia  [1].

Redescription and update of the current and potential distribution area of Impatiens mexicana Rydb. 1910.

The balsam Impatiens mexicana is one of seven reported Native American species. Knowledge of Mexican endemic species has been scarce since the first description by Rydberg in 1910 and Barringer's research in 1991, in addition to some reported cases that locate the current distribution of the species in Veracruz, Oaxaca, and a suspicious record in the north of the country in the state of Zacatecas. To contribute to the knowledge of I. mexicana from an integrative perspective, geographic, morphological, and molecular studies were carried out. Expeditions from July to October 2021 in locations of Hidalgo and Veracruz, Mexico, were done while plant material was collected. In the morphological studies, the specimens of I. mexicana were measured, photographed, and compared with available information of the six American Balsams; 25 taxonomic and geographic attributes were selected to contrast and achieve the discrimination. Complementary barcode genes were used to elucidate its phylogenetic position between American Impatiens; for this purpose, from February to March 2022, plant tissue of I. turrialbana was collected in the provinces of Turrialba, San José, and Cartago, Costa Rica. Finally, SDMs were performed in order to predict the Mexican balsam's ideal climatic zones. Here, I. mexicana is reported for the first time in Hidalgo state, increasing its geographic distribution in central Mexico, while ideal climatic conditions occur in the central and southern states. New characteristics in the Mexican species are included, highlighting the presence of a white or green hump in the upper petal that continues into a white and large horn that finishes in a concave tip, three types of spur directions (recurved, reflexed, and gradual concave taper to recurved) and yellow flowers with red spots that cover lateral, dorsal and ventral faces of the flower with special emphasis in spots distribution on the basal lobes which do not invade the >50% of these structures. The Mexican species is separated by a series of characteristics with its six American congeners, emphasizing the color of the flower, the distribution of spot patterns, the variations in the direction of the spur, and the elevation at which the studied populations occur. I. mexicana overlaps morphologically mostly with I. capensis; however, it can be differentiated by the distribution of spot patterns on the upper petal, lower sepal and lateral petals, the separation of lateral petals (I. capensis show both lateral petals overlapped each other and separated), the altitude and geographic distribution. Within and between populations, I. mexicana exhibits variations in the intensity of yellow petal color, distribution of petal spots, and spur direction. Thus, these three approaches increase knowledge of the little-known I. mexicana. However, some characteristics are missing in the American species, so future efforts in redescriptions are essential. Furthermore, future contributions to the micromorphology in reproductive structures of the species may complement the current differentiation, while expeditions in the proposed potential areas are fundamental.

1 - Autonomous University Of Hidalgo State (UAEH), Molecular Systematics Laboratory, Biological Research Center, Pachuca-Tulancingo, Carboneras, Mineral De La Reforma, Hgo., 42186, México
2 - University of Lodz, Faculty of Biology and Environmental Protection, Department of Geobotany and Plant Ecology, Banacha 12/16, PL -90-237, Lodz, Poland
3 - University of Warsaw, Białowieża Geobotanical Station, Faculty of Biology, 17-230 Białowieża, Poland.
4 - Autonomous University Of Hidalgo State (UAEH), Pachuca-Tulancingo, Carboneras, Mineral De La Reforma, Hgo., 42186, México
5 - Autonomous University Of Hidalgo State (UAEH), Genetics Laboratory, Biological Research Center, Pachuca-Tulancingo, Carboneras, Mineral De La Reforma, Hgo., 42186, México


Presentation Type: Recent Topics Poster
Number: PRT007
Abstract ID:1355
Candidate for Awards:None

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