Relative humidity control in equilibration studies

Henderson, Sylvia; Pixton, S.W.

doi:10.1002/jsfa.2740321202

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Depending on the size of desiccators (3–6 L capacity), 100–200 mL of saturated solutions were added and lids were sealed with vacuum grease. Henderson & Pixton (1981) reported that good humidity control was achieved with 100 mL of saturated salt solution in a 6‐L desiccator and, although the quantities of controlling solution and seeds affected the amounts of water exchanged, the equilibrium relationship was not affected. Saturated solutions were prepared by dissolving crystals in deionized water.…”

Section: Methodsmentioning

confidence: 99%

Effect of temperature and humidity on the longevity of Orobanche seeds

Kebreab

Murdoch

1999

Weed Research

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The effects of moisture and temperature on seed longevity were studied over periods of up to 426 days in three species of Orobanche. Saturated salt solutions were used to achieve equilibrium relative humidities (e.r.h.) between 11% and 85% at temperatures of 20–60 °C. The viability equation describing loss of viability in these conditions applied to the three species such that the lower the temperature and lower the equilibrium relative humidity the greater the longevity. The initial viability differed between species with the seed lot of Orobanche crenata having the lowest viability. However, the relative effect of temperature on longevity and the relative sensitivity of seed longevity to changes in equilibrium relative humidity were the same in all species. Longevity, estimated by the standard deviation of the seed survival curves was greater in Orobanche aegyptiaca and O. crenata than in Orobanche minor, being for example about 100, 103 and 49 days, respectively, at 40 °C, 50% e.r.h. Accurate prediction of longevity is necessary to understand and quantify the population dynamics of weeds and will help the farmer to optimize control measures such as solarization. Taken in conjunction with published data on loss of viability of imbibed seeds, the annual loss of viability on a typical Eritrean farm is predicted to be about 38%.

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Section: Methodsmentioning

confidence: 99%

Effect of temperature and humidity on the longevity of Orobanche seeds

Kebreab

Murdoch

1999

Weed Research

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“…An electronic hygrometer (Hygroscop II) was used for direct aw measurements. aw adjustment by equilibration with saturated solutions (19,26,28,30). Dry powdered inocula (1 g) were placed in a closed chamber in which the aw was controlled by saturated salt solutions.…”

Section: Methodsmentioning

confidence: 99%