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establishment, much shoot growth would occur inside the tube, where the effects of temperature and light on shoot growth might be quite different from what has been observed in either grapevines or trees. In both forestry and grape production, the soil is

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on the influence of temperature on stevia growth and development in controlled environments is lacking. Increasing daily light integral generally decreased plant height and individual leaf area ( Evans et al., 2015 ). For field-grown plants

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138 ORAL SESSION 37 (Abstr. 639–644) Temperature Stress–Vegetables

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plant because of its compact growth. However, key aspects that contribute to the domestication and ornamental use of Z. compacta are unknown, such as the environmental conditions for its germination, especially the temperature. Zephyra compacta ’s

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Abstract

Either imbibition at low temperatures or fast water uptake reduced germination of chickpea (Cicer arietinum L.) by 15%. The combination of imbibition at low temperatures and fast water uptake reduced germination by 65%. The most chilling-sensitive period for chickpea germination is the first 30 minutes of imbibition. Slow imbibition at 20°C for 24 hours prior to seeding of mechanically damaged chickpea seeds significantly improved percentage of germination, and uniform, vigorous seedlings resulted. Such prehydrated seeds also showed better emergence under field conditions, especially in early spring when the soil was still cold. The results suggest that mechanically damaged seeds sown in cold, wet soil undergo imbibitional chilling injury and fast water uptake, leading to poor field emergence. Prehydration of seeds by slow imbibition at warm temperature and/or fungicide application increased the germination and emergence of chickpeas sown into cold, wet soils.

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additional building structural modification for the additional weight of the medium, plants, and retained water ( Oberndorfer et al., 2007 ). An unirrigated extensive green roof can be a challenging environment for plants to grow in as temperature, light

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