Bjorn - Photobiology - The Science of Life and Light 2e (Springer, 2008).pdf - biologia - vortext

Photobiology

Second Edition

Photobiology

The Science of Life and Light

Second Edition

Edited by

Lars Olof Björn

Lund University

Lund, Sweden

Lars Olof Björn

Department of Plant Physiology

Lund University

Sölvegatan 35

SE-223 62 Lund

Sweden

Lars_Olof.Bjorn@cob.lu.se

Library of Congress Control Number: 2007928823

ISBN: 978-0-387-72654-0

e-ISBN: 978-0-387-72655-7

Printed on acid-free paper.

permission of the publisher (Springer Science+Business Media, LLC., 233 Spring Street, New York,

NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use

in connection with any form of information storage and retrieval, electronic adaptation, computer

software, or by similar or dissimilar methodology now known or hereafter developed is forbidden.

The use in this publication of trade names, trademarks, service marks, and similar terms, even if

they are not identified as such, is not to be taken as an expression of opinion as to whether or not

they are subject to proprietary rights.

987654321

springer.com

(Drawing by Per Nilsson)

Photobiology

I am lying on my back beneath the tree,

dozing, looking up into the canopy,

thinking: what a wonder!—I can see!

relying on the stars for guiding light.

Imprinted in their little heads are Gemini,

Orion, Dipper, other features of the sky.

There is room for clocks that measure

day and night,

But in the greenery above my face,

an even greater miracle is taking place:

Leaves catch photons from the sun

and molecules from air around.

Quanta and carbon atoms become bound.

Life, for them, has just begun.

Correct for movement of the sky

and tell the time for flight

Deep into oceans, into caves

the sun cannot directly send its waves.

But through intricacies of foodweb’s maze,

oxygen from chloroplasts, luciferin, luciferase,

at times, in place,

where night and darkness seem to reign,

solar quanta emerge as photons

The sun not only creates life, it also takes away

mostly by deranging DNA.

Damage can be, in part, undone

by enzymes using photons from the sun.

once again.

Summer nears its end, already ’cross the sky

southward aiming birds are flying by.

Other birds for travel choose the night

L.O. Björn 2002

Bjorn - Photobiology - The Science of Life and Light 2e (Springer, 2008).pdf

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