Download PDF by G. E. Fogg (auth.), Professor Dr. Lal Chand Rai, Professor: Algal Adaptation to Environmental Stresses: Physiological,

By G. E. Fogg (auth.), Professor Dr. Lal Chand Rai, Professor Dr. Jai Prakash Gaur (eds.)

ISBN-10: 3642594913

ISBN-13: 9783642594915

ISBN-10: 3642639968

ISBN-13: 9783642639968

Algae, as a rule held because the crucial basic manufacturers of aquatic platforms, inhabit all feasible habitats. they've got nice skill to deal with a harsh atmosphere, e.g. super low and high temperatures, suboptimal and supraoptimal gentle intensities, low availability of crucial food and different assets, and excessive concentrations of poisonous chemical substances, and so forth. a mess of physiological, biochemical, and molecular suggestions permit them to outlive and develop in tense habitats. This booklet provides a severe account of varied mechanisms of tension tolerance in algae, lots of which can take place in microbes and vegetation as well.

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Extra info for Algal Adaptation to Environmental Stresses: Physiological, Biochemical and Molecular Mechanisms

Example text

1995), and a possible trigger is the low CO2 concentration adjacent to the cellular plasma membrane. e. when the temperature, irradiance and nutrient supply are high. Thus, these algae could alleviate a possible Ci limitation under such favourable growth conditions by making the plasma membrane more permeable for HC0 3-. e. carbon stress in a strict sense). 3 Molecular Responses Little is known about the actual molecular sensor responding to carbon stress in algae. Due to the high potential impact of the stress, it is likely to be a general stress sensor.

According to the specific role of irradiance in carbon stress, certain parts of Chapter 6 are also relevant to the present text. A low CO2 supply could have several reasons. Firstly, since seawater may contain various amounts of CO2, it will depend on the specific CO2 concentration of a certain habitat. Secondly, since normal, air-equilibrated seawater contains some 180 times more ionic Ci (bicarbonate, HC0 3- and carbonate, C032") than CO2, it will depend on to which degree the algae can utilise these ionic carbon forms.

Thylakoid lumen or acid vacuoles, cf. Raven 1997b,c). In addition, at least some types of HC0 3" utilisation (notably types 3 and 4) imply a CCM at the plasma membrane (cf. Fig. 2). Thus, while many red and brown macroalgae appear to have a CCM at the plasma membrane level, little is known of CCMs inside the cells. This is true also for the type 2 mechanism because the HC0 3" transporter is a proposed anion exchange protein that only facilitates this transport along an electrochemical gradient but cannot transport HCO l " against it (Drechsler et al.

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Algal Adaptation to Environmental Stresses: Physiological, Biochemical and Molecular Mechanisms by G. E. Fogg (auth.), Professor Dr. Lal Chand Rai, Professor Dr. Jai Prakash Gaur (eds.)


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