Plant Physiology Taiz And Zeiger 5th Edition Pdf 186

Temperature is the driving force for several chemical reactions occurring in plant cells at different stages throughout the life cycle. Decreases in temperature below the optimum range generally decrease the rate of chemical reactions. Sub-optimal temperature increases the probability of early-season seedling injury from pests and pathogens in peanuts with potential seedling death, ultimately resulting in reduced plant populations and lower yield potential (Prasad et al., 2006; Bell et al., 1993; Bell, 1986). Leong and Ong (1983) reported a linear increase in rate of peanut development with increasing temperature from 19 to 31 C. Low temperature in the early season can also have pronounced effects on the physiology and biochemistry of seedlings, resulting in reduced plant growth and development due to lower photosynthetic rates (Allen and Ort, 2001). Reduced net assimilation rate under low temperature can be due to stomatal factors, such as stomata closure or non-stomatal factors, such as deactivation of Rubisco (Holaday et al. 1992; 2016). Bagnall et al. (1988) reported 50 to 70% decrease in net photosynthesis within the first two d with a change in temperature from 30 to 19 C. The authors further indicated that the decrease in net photosynthesis under sub-optimal temperature conditions was due to non-stomatal limitations.

Plant Physiology Taiz And Zeiger 5th Edition Pdf 186
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Schulte PJ. 2009. Water transport processes in desert succulent plants. In: De la Barrera E, Smith WK, eds. Perspectives in Biophysical Plant Ecophysiology: A tribute to Park S. Nobel. Mexico City: Universidad Nacional Autónoma de México, pp. 39-55. ISBN: 978-0-578-00421-1

Hydraulic traits, phenology, and resources acquisition in desert trees. Mexico harbors the richest desert flora in the world, yet the ecophysiology and hydraulic features of this widespread Mexican environment have been poorly studied. Desert environments are characterized by low and unpredictable precipitation. Under these extreme conditions, water stress is a dominant selective pressure that may act in different directions, resulting in a diversity of plant structural and functional attributes that allow plant survival. For desert plants, the study of plant hydraulic traits, and their relationship with resource use, are important to identify different strategies displayed by individual plants to enhance survival or reproduction. The fast-slow plant economics spectrum is a general frame that allows determining the use of resources by plants based on the relative carbon costs of tissues and organs (Reich 2014). In this spectrum, the central concept is that plants face a trade-off between productivity and persistence.
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