Environmental calcium modifies induced defences in snails
نویسندگان
چکیده
منابع مشابه
A calcium antagonist, nifedipine, modifies exercise-induced asthma.
In eight extrinsic asthmatic subjects (age range 16-38 years) there was a significant reduction (p less than 0.01) in the severity of bronchoconstriction after a treadmill exercise test performed 30 minutes after nifedipine 20 mg sublingually. The maximum fall in peak expiratory flow after exercise was 36.0 +/- SEM 5.3% compared with a maximum fall of 56.5 +/- 4.1% after matched placebo capsule...
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The lungs are one of the most important organs exposed to environmental agents. The lungs have the ability to protect themselves by both immunological and nonimmunological mechanisms. An individual’s susceptibility to the impact of environmental agents will determine their adverse effects. This article focuses on air pollution, in particular ozone (O3), nitrogen dioxide (NO2), particulate matte...
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Indirect responses are defensive strategies by which plants attract natural enemies of their herbivores that act as plant defending agents. Such defences can be either constitutively expressed or induced by the combined action of mechanical damage and low- or high-molecular-weight elicitors from the attacking herbivore. Here, we focus on two induced indirect defences, namely the de novo product...
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Grazing-induced plant defences that reduce palatability to herbivores are widespread in terrestrial plants and seaweeds, but they have not yet been reported in seagrasses. We investigated the ability of two seagrass species to induce defences in response to direct grazing by three associated mesograzers. Specifically, we conducted feeding-assayed induction experiments to examine how mesograzer-...
متن کاملCalcium, snails, and birds: a case study
Accepted 3 March 2000 Copyright © EEF ISSN 1399-1183 The importance of calcium for living organisms is a wellknown fact. It is widely understood that some animals, like crustaceans, molluscs and birds, require calcium in unusual quantities during certain stages of their life. For example, egg-laying birds need 10–15 times as much calcium per day as reptiles and mammals with developing eggs or e...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of London. Series B: Biological Sciences
سال: 2004
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rsbl.2003.0106