Polyploidy as a Factor in the Evolution of the Bouteloua curtipendula Complex (Poaceae: Chloridoideae)

2017 ◽  
Vol 42 (3) ◽  
pp. 432-448
Author(s):  
Maria Elena Siqueiros-Delgado ◽  
Amanda E. Fisher ◽  
J. Travis Columbus
Keyword(s):  
Bouteloua Curtipendula

EMBRIOGÉNESIS SOMÁTICA INDUCIDA CON ESTRÉS OSMÓTICO EN Bouteloua curtipendula (Michx.) Torr., ESPECIE RECALCITRANTE Y APOMÍCTICA

2015 ◽  
Vol 38 (4) ◽  
pp. 359
Author(s):  
Álvaro Bernal-Flores ◽  
Adrián R. Quero-Carrillo ◽  
Alejandrina Robledo-Paz ◽  
H. Araceli Zavaleta-Mancera ◽  
Paulino Pérez-Rodríguez
Keyword(s):  
Bouteloua Curtipendula

En el presente estudio varios medios de cultivo con diferentes auxinas fueron establecidos para la regeneración de plantas normales en pasto Banderita Bouteloua curtipendula (Michx.) Torr., a partir de callos inducidos en cariópsides (explantes) maduros cultivados en medio MS basal suplementado con 2,4-ácido diclorofenoxiacético y varias citocininas. Los medios MS+2,4-D+BAP suplementados con sorbitol (MI-13, MI-14) dieron origen a callos con características morfogénicas con potencial de regeneración. Los callos embriogénicos obtenidos a partir de MI-14 fueron colocados en diferentes medios de regeneración, entre los que MR-2 mostró la mayor frecuencia de regeneración (95.8 %) y eficiencia de conversión (13.9 %). Plántulas verdes, morfológicamente normales, fueron obtenidas con medio suplementado con cinetina (1 mg L-1), ácido naftalenacético (0.2 mg L-1) y ácido giberélico (0.2 mg L-1). El estrés osmótico y el balance hormonal resultante de la adición de sorbitol, estimuló la formación de proembroides en callos friables y de embriones somáticos en pasto Banderita. Se presenta aquí el primer protocolo de regeneración en esta especie apomíctica recalcitrante, que pueda ser útil en trabajos futuros basados en técnicas de cultivo de tejidos.

scholarly journals Caracterización estomática, concentración de clorofila y su relación con producción de biomasa en Bouteloua curtipendula

2018 ◽  
Vol 29 (2) ◽  
pp. 251
Author(s):  
Alan Álvarez-Holguín ◽  
Carlos Raúl Morales-Nieto ◽  
Raúl Corrales-Lerma ◽  
Carlos Hugo Avendaño-Arrazate ◽  
Héctor Oswaldo Rubio-Arias ◽  
...  
Keyword(s):  
Biomass Production ◽  
Concentration Index ◽  
Stomatal Density ◽  
Chlorophyll Concentration ◽  
Stomatal Index ◽  
Bouteloua Curtipendula ◽  
Negative Effect ◽  
Animal Sciences ◽  
Positive Effect ◽  
Genotype E

The stomatal characteristics and chlorophyll concentration are some of the main parameters, to determine plant productivity. The objective of the present study was to characterize the stomatal density and distribution to estimate the chlorophyll concentration and evaluate their effect on the biomass production of sideoatsgrama[Bouteloua curtipendula (Michx.) Torr.] genotypes. The experiment was performed from May to July 2015 under greenhouse conditions, at- the School of Animal Sciences and Ecology of the Autonomous University of Chihuahua, Mexico. Three commercial varieties were studied: El Reno, Niner, Vaughn and two native genotypes: E-689 and E-592 of side-oats grama. The variables evaluated were chlorophyll concentration index (CCI), stomatal density (SD), trichome density (TD), stomatal index (SI), and stomatal area (SA). These variables were related to biomass production (BP) applying regression analysis. SD and SI showed a negative effect on BP, while SA and CCI showed a positive effect. The genotype E-689 showed the lowest (p<0.05) SD and SI, with values from 152.7 to 275 stomatal/μm2 and from 13.41 to 16.03%, respectively. In addition, it also presented the highest (p<0.05) SA and BP, with values from 186.7 to 361.7 μm2 and 13.5 to 30.3 g, respectively. In conclusion, genotypes of side-oats grama with lower stomatal density and stomatal index and higher stomatal area and chlorophyll concentration index could produce higher amounts of biomass.

Development of Range Grass Seedlings Germinated in Picloram

Weed Science ◽  
1972 ◽  
Vol 20 (4) ◽  
pp. 341-344 ◽  
Author(s):  
C. J. Scifres ◽  
J. C. Halifax
Keyword(s):  
Panicum Virgatum ◽  
Shoot Elongation ◽  
Buchloe Dactyloides ◽  
Bouteloua Curtipendula ◽  
Radicle Elongation ◽  
Relative Tolerance ◽  
Petri Dishes ◽  
Digitaria Californica ◽  
Sideoats Grama

Picloram (4-amino-3,5,6-trichloropicolinic acid) did not influence germination but differentially regulated postgermination growth of range grass seedlings. Radicle elongation of buffalograss(Buchloe dactyloides[Nutt] Elgelm.), sideoats grama(Bouteloua curtipendula[Michx.] Torr.)3, and switchgrass(Panicum virgatumL.) in petri dishes was reduced by 125 ppb picloram, whereas shoot elongation was not retarded by 1,000 ppb. Buffalograss, sideoats grama, and switchgrass seedlings, germinated in soil containing 500 ppb picloram, were usually not reduced in topgrowth production. However, topgrowth production of Arizona cottontop(Digitaria californica[Benth.] Henr.) and vine mesquite(Panicum obtusumH. B. K.) was reduced by 125 to 250 ppb of picloram in soil. Relative tolerance to picloram was ranked buffalograss, sideoats grama>switchgrass>vine mesquite, Arizona cottontop.

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