Evaluación de daños por heladas tardías en ensayos de procedencias de pino oregón introducidos en el norte de la Región Andino Patagónica Argentina

“…Visual assessment was the simplest method, as it requires no equipment, and thus was most commonly used (Figure 10). In VA, the samples were either visually observed and compared to a grading scale [70,109,110], or a damaged/undamaged grading was given [111,112]. Sometimes microscopes were used [113], although these instances were scored together with the rest.…”

Section: Measuring Freezing Damagementioning

confidence: 99%

Methods for Measuring Frost Tolerance of Conifers: A Systematic Map

Zamkova

Steele

Smith

2021

Forests

View full text Add to dashboard Cite

Frost tolerance is the ability of plants to withstand freezing temperatures without unrecoverable damage. Measuring frost tolerance involves various steps, each of which will vary depending on the objectives of the study. This systematic map takes an overall view of the literature that uses frost tolerance measuring techniques in gymnosperms, focusing mainly on conifers. Many different techniques have been used for testing, and there has been little change in methodology since 2000. The gold standard remains the field observation study, which, due to its cost, is frequently substituted by other techniques. Closed enclosure freezing tests (all non-field freezing tests) are done using various types of equipment for inducing artificial freezing. An examination of the literature indicates that several factors have to be controlled in order to measure frost tolerance in a manner similar to observation in a field study. Equipment that allows controlling the freezing rate, frost exposure time and thawing rate would obtain results closer to field studies. Other important factors in study design are the number of test temperatures used, the range of temperatures selected and the decrements between the temperatures, which should be selected based on expected frost tolerance of the tissue and species.

show abstract

“…This proposal adds to other efforts where the visual condition relates to the physiology of the plant (i.e., in response to water stress) (Tyree et al, 2003). For example, in studies of assisted migration, the most suited genotypes for upward movement along an altitudinal gradient were selected based on visual evaluation of the percentage of plant necrosis caused by frost damage (Martínez et al, 2005;Viveros-Viveros et al, 2006).…”

Section: 3mentioning

confidence: 99%

RELATIONSHIP BETWEEN CHLOROPHYLL CONTENT AND NEEDLE COLOR OF Abies religiosa KUNTH, SCHLTDL. et CHAM

et al. 2020

View full text Add to dashboard Cite

Evaluation of the physiological performance of plants as an environmental response is crucial to understand the ecological succession in plant communities and to implement strategies that increase plant survival and growth for restoration efforts and commercial plantations; however, evaluating plant physiology often requires complex and expensive technical equipment not normally accessible to all researchers and non-specialized people. In the present study, we explored the relationship of the visual condition of the needles with an indicator of their photosynthetic capacity related to chlorophyll content in Abies religiosa. A visual stress index was developed to evaluatethe response to environmental stress in seedlings of A. religiosa during a reforestation effort, and the correlation between leaf chlorophyll content and different categories of the stress index. The replicability of the index was also tested to determine its applicability by non-specialized people. A high correlation was detected between the index and chlorophyll concentration (r2 = 0.76; P < 0.0001). Additionally, there was a significant agreement on the index among several observers (W = 0.95; P < 0.0001). Overall, the stress index is related the physiological condition of the plants and can be adopted by people, after training, to make evaluations of the physiological status of A. religiosa seedlings.

show abstract

Evaluación de daños por heladas tardías en ensayos de procedencias de pino oregón introducidos en el norte de la Región Andino Patagónica Argentina

Cited by 4 publications

References 4 publications

Altitudinal genetic variation in Pinus hartwegii Lindl. I: Height growth, shoot phenology, and frost damage in seedlings

Altitudinal genetic variation in Pinus hartwegii Lindl. I: Height growth, shoot phenology, and frost damage in seedlings

Methods for Measuring Frost Tolerance of Conifers: A Systematic Map

RELATIONSHIP BETWEEN CHLOROPHYLL CONTENT AND NEEDLE COLOR OF Abies religiosa KUNTH, SCHLTDL. et CHAM

Contact Info

Product

Resources

About