Seed Germination in Desert Plants

Discussed here are the ways and means by which desert plants have adapted through the course of evolution to their extreme environment.

Author: Yitzchak Gutterman

Publisher: Springer Science & Business Media

ISBN: 9783642756986

Category: Science

Page: 253

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During germination, the most resistant stage of the life cycle - the seed - changes to the most sensitive stage, namely the seedling. Therefore, in desert plant species seed dispersal and subsequent germination in the optimum time an place place are particularly critical parameters. Discussed here are the ways and means by which desert plants have adapted through the course of evolution to their extreme environment. Two such strategies which have evolved are a) plants with relatively large and protected seeds which germinate when the chance of seedling survival is high and the risk relatively low or b) those with an opportunistic strategy: minute seeds which germinate after low rainfall under high risk for seedling survival if additional rain does not follow. Most species adopt a combination of the two mechanisms. Species have adapted both genotypically and phenotypically, both aspects of which are also discussed in this thorough text. The reader is provided with a good understanding of the complex influences on each seed traced through from initial development to germination stage regarding germination preparation and subsequent survival.
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Survival Strategies of Annual Desert Plants

After 40 years of research in hot deserts Yitzchak Gutterman provides a comprehensive treatise of such adaptations and strategies.

Author: Yitzchak Gutterman

Publisher: Springer Science & Business Media

ISBN: 9783642559747

Category: Science

Page: 348

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Annual desert plant species of unrelated taxa in the Negev Desert of Israel have developed complementary sets of adaptations and survival strategies as ecological equivalents with physiological, morphological and anatomical resemblances, in the various stages of their life cycles. After 40 years of research in hot deserts Yitzchak Gutterman provides a comprehensive treatise of such adaptations and strategies. In doing so he covers the following topics: post-maturation primary seed dormancy, which prevents germination of maturing seeds before the summer; seed dispersal mechanisms with escape or protection strategies; cautious or opportunistic germination strategies; seedling drought tolerance. The day-length is an important factor in regulating flowering as well as the phenotypic plasticity of seed germination which is also affected by maternal factors.
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Seeds

Mass germination of plants under desert conditions : Effects of environmental factors during seed maturation , dispersal , germination and establishment of desert annual and perennial plants in the Negev highlands , Israel .

Author: Carol C. Baskin

Publisher: Elsevier

ISBN: 0120802635

Category: Science

Page: 666

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The evolution of seeds has contributed to one of the most astonishing explosions of biodiversity in history. Indeed, most plants employ seeds as reproductively crucial structures. Everything about seeds involves timing. Seeds result from fertilization occurring when conditions are favorable, i.e., after sufficient resources have been devoted to reproductive tissues. Furthermore, seeds help ensure that there are the necessary stored materials for the early growth and development of the next generation of plants. And finally, seeds allow the next generation to wait in a form of suspended animation until conditions for the next generation are once again favorable. This book about seeds focuses upon their two most important functions-dormancy and germination. The topics covered include the types of dormancy, theories of the relationship between dormancy and germination, the timing of germination, the various factors that control germination, and the general aspects of germination in different sorts of habitats. Ecologists, plant scientists, agriculturists, foresters-indeed, anyone interested in plants and their life cycles will want to add this title to his or her library.
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Dispersal Biology of Desert Plants

This book describes the ways and means - anatomical, morphological and ecological - by which dispersal in desert plants has evolved to ensure the survival of these species in their harsh and unpredictable environment.

Author: Karen van Rheede van Oudtshoorn

Publisher: Springer Science & Business Media

ISBN: 9783662035610

Category: Science

Page: 242

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Dispersal processes have important effects on plant distribution and abundance. Although adaptations to long range dispersal (telechory) are by no means rare in desert plants, many desert plant species do not possess any features to promote dispersal (atelechory), while others have structures that hamper dispersal (antitelechory). The high frequency with which atelechorous and antitelechorous mechanisms are present in plants inhabiting arid areas indicates the importance of these adaptations. Among the benefits derived from these adaptations are the spreading of germination over time, the provision of suitable conditions for germination and subsequent seedling establishment, and the maintenance of a reservoir of available seeds (seed bank). This book describes the ways and means - anatomical, morphological and ecological - by which dispersal in desert plants has evolved to ensure the survival of these species in their harsh and unpredictable environment.
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Adaptation of Dryland Plants to a Changing Environment

Seed Germination in Desert Plants. Berlin: Springer. doi:10.1007/978-3-642-75698-6 Gutterman, Y. (2000). Environmental factors and survival strategies of annual plant species in the Negev Desert, Israel. Plant Species Biol.

Author: Zhiyou Yuan

Publisher: Frontiers Media SA

ISBN: 9782889633159

Category:

Page:

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Desert Plants

4.2 Seed germination strategies of 22 annual species in Horqin Sandy Land risk-taking strategy by germinating early in the growing season, and other 11 species showed a risk-avoiding strategy by decreasing the amount of seeds ...

Author: Kishan Gopal Ramawat

Publisher: Springer Science & Business Media

ISBN: 9783642025501

Category: Science

Page: 503

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Deserts appear very fascinating during our short visits. However, the lives of plants and animals are very dif?cult under the harsh climatic conditions of high tempe- ture and scant water supply in deserts, sometimes associated with high concent- tions of salt. The editor of this book was born and brought up in the Great Indian Desert, and has spent much of his life studying the growth and metabolism of desert plants. It is very charming on a cool summer evening to sit at the top of a sand dune listening only to blowing air and nothing else. It has been my dream to prepare a volume on desert plants encompassing various aspects of desert plant biology. In this book, I have tried to present functional and useful aspects of the vegetation resources of deserts along with scienti?c input aimed at understanding and impr- ing the utility of these plants. The scant vegetation of deserts supports animal life and provides many useful medicines, timber and fuel wood for humans. Therefore, there are chapters devoted to medicinal plants (Chap. 1), halophytes (Chaps. 13, 14), and fruit plants (Chaps. 17, 20). Desert plants have a unique reproductive biology (Chaps. 9–11), well-adapted eco-physiological and anatomical charact- istics (Chap. 7), and specialised metabolism and survival abilities. These plants are dif?cult to propagate and pose many problems to researchers developing biote- nological approaches for their amelioration (Chaps. 18–20).
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Selected Water Resources Abstracts

GEYSERS GERMANY Report on the Analysis of Thermal Pollution of the Rhine River Resulting from Powerplants ... Aspects of Germination of Desert Seeds , W73-05152 6-08 21 Biomass and Production of Macrobenthos in the Deeper parts of Kiel ...

Author:

Publisher:

ISBN: UOM:39015034723018

Category: Hydrology

Page:

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