Base Temperatures for Seedling Growth and Their Correlation with Chilling Sensitivity for Warm-Season Grasses

Madakadze, I. C.; Stewart, Katrine A.; Madakadze, R.; Smith, Donald L.

doi:10.2135/cropsci2003.0874

Cited by 14 publications

(21 citation statements)

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“…In the distribution of genotypes ( Figure 1A) it shows that H-516, M-44 and M-61 (genotypes p, b and h, respectively) form the group of susceptible materials at low temperatures. The susceptibility of the H-516 is mainly because it was not selected to tolerate suboptimal temperatures, which coincides with that reported by Madakadze et al (2003), about the pressure of ecophysiological selection is crucial for tolerance to low temperatures. Groups of tolerant and susceptible materials can even be separated into two distinct subgroups, one of them located in quadrants III and IV ( Figure 1B), grouping the temperatures of 4 and 25 °C.…”

Section: Resultssupporting

confidence: 87%

“…En la distribución de los genotipos (Figura 1A), se observa que H-516, M-44 y M-61 (genotipos p, b y h, respectivamente) forman el grupo de materiales susceptibles a bajas temperaturas. La susceptibilidad del H-516 se debe principalmente a que no fue seleccionado para tolerar temperaturas subóptimas, lo cual coincide con lo reportado por (Madakadze et al, 2003), respecto a que la presión de selección ecofisiológica es determinante para la tolerancia a bajas temperaturas. Los grupos de los materiales tolerantes y susceptibles se pueden incluso separar en dos subgrupos bien definidos, situado uno de ellos en los cuadrantes III y IV (Figura 1B) y que agrupa a las temperaturas de 4 y 25 °C.…”

Section: Resultados Y Discusiónunclassified

“…La respuesta a bajas temperaturas ha sido estudiada comparando plántulas aclimatadas y no aclimatadas (Prasad, 1997;Madakadze et al, 2003), o entrecruzando genotipos con diferente procedencia y tolerancia en varias fases del desarrollo. Sin embargo, esta tolerancia en líneas endogámicas de maíz aún no se define si es determinante o no el comportamiento de los híbridos que puede formar (Revilla et al, 2000).…”

Section: Introductionunclassified

“…The response at low temperatures has been studied by comparing acclimated and non-acclimated seedlings (Prasad, 1997;Madakadze et al, 2003) or by crosslinking genotypes with different origins and tolerance in several stages of development. However, this tolerance in inbred lines of maize has not been defined just yet, whether if it is determinant or not for the behaviour which can form hybrids (Revilla et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Calidad fisiológica de semilla y desarrollo de plántulas de maíz a temperaturas bajas

Gámez-Vázquez

O-Olán

Avila-Perches

et al. 2017

Remexca

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La adaptación del cultivo de maíz a siembras tempranas requiere de mejorar su tolerancia a bajas temperaturas, en términos de capacidad de las semillas para germinar y generar plántulas que prosperen a tales temperaturas. El objetivo del presente trabajo fue identificar las variables que a nivel de semilla y plántula están involucrados en la tolerancia a bajas temperaturas de líneas e híbridos de maíz adaptados a los Valles Altos de México. Se evaluaron en condiciones de laboratorio e invernadero 17 materiales genéticos, incluidos un híbrido del trópico y una variedad sintética de condiciones templadas. Los genotipos se evaluaron en laboratorio en temperaturas de: 4, 8, 12 y 25 °C. Los materiales genéticos originarios de la zona de mayor altitud presentaron mejor tolerancia, altos porcentajes de germinación, peso seco de plúmula y radícula; además de mayor velocidad de emergencia. El peso seco de la radícula fue proporcionalmente menos afectada que la plúmula por bajas temperaturas. La respuesta de tolerancia a bajas temperaturas se indujo en los genotipos susceptibles al reducir de 8 a 4° C la temperatura. Los resultados sugieren que la prueba fría con 8° C durante 7 días previo a la inducción de la germinación puede considerarse como una prueba rápida para detectar tolerancia a bajas temperaturas.

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Section: Resultssupporting

confidence: 87%

Section: Resultados Y Discusiónunclassified

Section: Introductionunclassified

Section: Introductionmentioning

confidence: 99%

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Calidad fisiológica de semilla y desarrollo de plántulas de maíz a temperaturas bajas

Gámez-Vázquez

O-Olán

Avila-Perches

et al. 2017

Remexca

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“…In contrast, upland ecotypes are shorter, produce less biomass, and they are predominantly found in drier and colder areas [1]. Also, studies have shown intraspecific variations in both upland and lowland cultivars in biomass yield and other traits [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Growth and Yield Responses of Switchgrass Ecotypes to Temperature

Kandel¹,

Wu²,

Kakani

2013

AJPS

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Varietal differences of switchgrass in growth and development, biomass yield and partitioning in response to temperature are not well documented. A study was conducted to quantify the effect of temperature on growth, development, and feedstock quality of switchgrass cultivars, and to determine differences between upland and lowland switchgrass. Two lowland ("Alamo" and "Kanlow") and two upland ("Caddo" and "Cave-in-Rock") cultivars of switchgrass were grown in pots filled with pure, fine sand in growth chambers. Four different temperature treatments of 23˚C/15˚C, 28˚C/20˚C, 33˚C/25˚C, and 38˚C/30˚C with 14/10 hours day/night were imposed at four leaf stage. High temperature significantly decreased the biomass yield across all cultivars. Stem elongation rate (SER) and leaf elongation rate (LER) decreased at the highest temperature treatment but lowland cultivars had significantly higher SER and LER across the temperature treatments. Upland cultivars produced more tillers across the temperature treatment. Both shoot/root and leaf/stem ratios increased under the highest temperature in all cultivars, but upland cultivars partitioned more to the leaf and root at higher temperature. Concentration of cellulose decreased at the highest temperature but temperature had no effect on lignin concentration of leaf and stem biomass. In conclusion, although none of the cultivars studied showed strong tolerance to high temperature, differences were observed for many traits of switchgrass in response to temperature.

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Improved ALMANAC simulations of upland switchgrass ecotypes in the northern United States

2022

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This investigation used a modified parameterization of the Agricultural Land Management Alternative with Numerical Assessment Criteria (ALMANAC) model to improve simulated growth and biomass yield of upland switchgrass (Panicum virgatum L.) ecotypes in northern U.S. locations. Leaf area development, biomass accumulation, and N utilization of upland ecotypes were parameterized by field evaluations from Montreal, QC, Canada, and sites throughout the northern U.S. Great Plains. Resulting ALMANAC simulations were validated against measured yields from 66 location–years of switchgrass production across 13 sites in Minnesota, North Dakota, and South Dakota. As contrasted to the model defaults, the modified parameterization reduced RMSE of annual simulated yields from 3.77 to 2.62 Mg ha−1 and improved percentage bias from −16 to 13%. Model performance was most improved in environments with no N fertilization, where ALMANAC simulated annual yields with an RMSE of 1.73 Mg ha−1 and percentage bias of −0.5%. Relative to the default ALMANAC parameterization, the modified parameterization also simulated a longer growing season and extended the median simulated maturity date from 1 to 28 August, greatly improving the estimation of switchgrass phenology within the study region. Sensitivity analyses revealed that simulated switchgrass yield was unaffected by modifications of runoff curve number and was most affected by modifications of radiation use efficiency. The other seven parameter modifications each had a median yield impact of 0.57–1.4 Mg ha−1. This work provides an improved characterization of upland switchgrass ecotypes in northern U.S. locations for future ALMANAC users.

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Base Temperatures for Seedling Growth and Their Correlation with Chilling Sensitivity for Warm-Season Grasses

Cited by 14 publications

References 0 publications

Calidad fisiológica de semilla y desarrollo de plántulas de maíz a temperaturas bajas

Calidad fisiológica de semilla y desarrollo de plántulas de maíz a temperaturas bajas

Growth and Yield Responses of Switchgrass Ecotypes to Temperature

Improved ALMANAC simulations of upland switchgrass ecotypes in the northern United States

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