Plants Botany

A revision of Clavija - Opera Botanica 107 (Theophrastaceae) - download pdf or read online

By Bertil Ståhl.

ISBN-10: 8788702561

ISBN-13: 9788788702569

Show description

Read or Download A revision of Clavija - Opera Botanica 107 (Theophrastaceae) PDF

Similar plants: botany books

Download e-book for iPad: Laboratory Guide for Conducting Soil Tests and Plant by J. Benton Jones Jr.

This e-book is of 1 that I fined it very worthwhile for me and my coleague

New PDF release: Advances in Botanical Research, Vol. 15

The newest quantity during this sequence keeps as a close evaluation in botanical technological know-how to a large viewers. The papers during this quantity are of normal curiosity and current interesting updates of vital points of plant progress, body structure, and replica.

Plant Surface Microbiology - download pdf or read online

So much vegetation depend upon the co-existence with microorganisms: either teams reap the benefits of those symbioses. it's been proven that an enormous variety of particular genes in crops and microorganisms are just activated in the course of those interactions. in fact, a variety of microbes additionally act as pathogens. Interactions among vegetation and microorganisms are frequently positioned on plant surfaces, equivalent to leaf cuticles, seeds and quite often at the roots.

Nitrogen Fixation and Metabolism in Soybean Plants - download pdf or read online

Within the first half, the authors introduce the development of researches on nitrogen metabolism of soybean nodules and roots. They examine the destiny of nitrogen fastened in soybean nodules through tracer scan with 15N2 gasoline. the consequences point out that significant a part of fastened N in bacteroids (a symbiotic country of rhizobia) is excreted quickly to cytosol of contaminated cells within the kind of ammonia, then the ammonia is assimilated into amino acids through GS/GOGAT pathway.

Additional resources for A revision of Clavija - Opera Botanica 107 (Theophrastaceae)

Sample text

There was certainly not more aggregation than would have followed from an immersion of from 5 m. to 10 m. in an equally strong solution of the carbonate. Lastly, a leaf was placed in thirty minims of a solution of one part of phosphate to 43,750 of water (1 gr. ); this soon caused the tentacles to be strongly inflected; and after 24 hrs. the contents of the cells were aggregated into oval and irregularly globular masses, with a conspicuous current of protoplasm flowing round the walls. But after so long interval aggregation would have ensued, whatever had caused inflection.

Mass well marked, extending down the tentacles for a length equal to that for the glands. After 2 hrs. the contents of almost all the ceIl~ in all the tentacles were broken up into masses of protoplasm. A leaf was immersed in a solution of one part of oxalate of ammonia to }46 of water; and after 24 m. some, but not a conspicuous, change could be seen within the cells beneath the glands. After 17 m. plenty of spherical masses of protoplasm were formed, and these extended down the tentacles for about the length of the glands.

At first we thought - but, as we now know, erroneously - that particles of such low specify gravity as those cork, thread and paper, would never come into contact with the surfact;s of the glands. The particles cannot act simply by their weight being added to that of the secretion, for small drops of water, many times heavier than the particles, were repeatedly added, and never produced any effect. Nor does the disturbance of the secretion produce any effect, for long threads were drawn out by a needle, and affixed to some adjoining object, and thus left for hours; but the tentacles remained motionless.

Download PDF sample

A revision of Clavija - Opera Botanica 107 (Theophrastaceae) by Bertil Ståhl.

by Kenneth

Rated 4.61 of 5 – based on 36 votes