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Sentences for "chlorophyll "
Botanists unite in describing the plants of this class as being destitute of chlorophyll and of starch.
The chlorophyll gives the leaf its green color, and this explains why a tree pales when it is in a dying condition or when its life processes are interfered with.
It can scarcely be expected that these lowly organised plants, differing so much in their manner of growth from the green or chlorophyll bearing plants, can be particularly nourishing.
It would be short-sighted philanthropy on the leaves' part to help the flowers win insect wooers at the expense of the plant's general health; therefore those in the upper whorl are fewer and much smaller than the leaves in the lower circle, and a sufficient length of stem separates them to allow the sunlight and rain to conjure with the chlorophyll in the group below.
These are most conspicuous when they displace the chlorophyll in autumn foliage.
It also forms part of its digestive apparatus, aiding a plant in the manufacture of its own food out of the soil, water, and gases; whereas a plant that lives by piracy - a parasite - or a saprophyte, that sucks up the already assimilated products of another's decay, loses its useless chlorophyll as surely as if it had been kept in a cellar.
A plant that does not manufacture its own dinner has no need of chlorophyll and leaves, for assimilation of crude food can take place only in those cells which contain the vital green.
Fungi and these degenerates which lack chlorophyll usually grow in dark, shady woods.
This basic domain organization shows a striking parallel to that of magnesium chelatase, a heterotrimeric enzyme containing BchD, BchI and BchH subunits, that performs ATP-dependent insertion of Mg 2+into the protoporphyrin IX ring in the course of chlorophyll biosynthesis [ 49 ] .
Our analyses do not support these earlier claims, but are in agreement with the recent analyses of genes involved in chlorophyll biosynthesis [ 43 ] , which indicated that the low GC Gram positive heliobacteria are closest to the last common ancestor of all oxygenic photosynthetic lineages.
Materials and methods Constructing exogenous spiking cRNA controls and a PCR amplicon printing set to assess oligonucleotide sensitivity Ten Arabidopsis thaliana genes corresponding to chlorophyll a/b-binding protein (Cab), lipid transfer protein 4 (Ltp4), lipid transfer protein 6 (Ltp6), NAC1, ribulose-5-phosphate kinase (PRKase), ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit (rbcL), rubisco activase (Ra), root cap 1 (RCP1), triosphosphate isomerase (TIM), and papain-type cysteine endopeptidase (XCP2) were chosen for PCR amplification on the basis of their plant-specific expression.
This simplest form of reproduction is shared by the chromacea (and the cognate bacteria) with the chromatella or chromatophora, the green particles of chlorophyll inside ordinary plant-cells, but these are only parts of a cell.
To be more precise, these green granules of chlorophyll must be regarded as organella of the plant-cell, or separated plasma-formations which arise beside the nucleus in the cytoplasm.
Afterwards they are converted, by a chemical process, into the green chlorophyll granules or chloroplasts, which have the most important function in the plasmodomism or carbon-assimilation of the plant.
The fact that the green chlorophyll granules grow independently within the living plant-cell and multiply by segmentation is very important and interesting.
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