Download PDF by Brian Capon: Botany for Gardeners: Third Edition

By Brian Capon

ISBN-10: 160469095X

ISBN-13: 9781604690958

A bestseller given that its debut in 1990, this quintessential and convenient reference has now been improved and up-to-date to incorporate an appendix on plant taxonomy and a accomplished index. dozen new pictures and illustrations make this new version even richer with details. Its handy paperback structure makes it effortless to hold and entry, no matter if you're in or out of the backyard. an important evaluate of the technology in the back of vegetation for starting and complex gardeners alike.

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Additional info for Botany for Gardeners: Third Edition

Sample text

Plants and animals, on the other hand, begin life as single, fertilized eggs and become larger as they mature. In the case of animals, including ourselves, a determinate growth pattern dictates a prefixed, maximum size that the body may reach. This pattern is implicit in and established by genes, cellular instructions inherited from parents, and is more or less related to the number of cells that the body is programmed to produce. Strenuous exercise may enlarge cells, but relatively few new cells are added.

Actually, because there is measurable metabolic activity in seeds that are viable—ultimately capable of germination—we say they are only dormant. Given the right conditions, a seed wakens from its dormancy and enters a short period of intense activity, the likes of which are not to be repeated at any other time during the plant’s life history. Watching the entire process of seed germination unfold within a matter of days is truly astonishing. Seeds are extraordinary objects. They are compact, easily stored, and capable of survival through freezing temperatures or prolonged drought, conditions that usually kill the parent plants.

Consequently, water absorption takes place a short way back, in an area where a fuzzy band appears around the root. This band is formed by thousands of projecting root hairs, extensions of the outer root cells that increase, by several hundred-fold, the organ’s absorptive surface area. Their presence increases the rate of water uptake proportionally. Root hairs are easily broken when a root is dug from the soil but can be seen on seedlings (radish is ideal) grown on a moist paper towel in a covered dish for about 5 days.

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Botany for Gardeners: Third Edition by Brian Capon

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