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|Title: ||Morphological variation, histology, histochemistry and nutrient contents of Frankia root nodules in Casuarina equisetifolia|
|Authors: ||Rajendran, K|
Basu, M Jothi
|Issue Date: ||Nov-2006|
Root nodules were collected from the
existing plantation of Casuarina
equisetifolia from three different agroclimatic zones of Tamil Nadu, India.
Morphological variation, histology, histochemistry and nutrient contents of the
nodules were studied. The nodules were found to be simple, dichotomously
branched and coralloid. The stele in simple and branched nodules reached up to
the tip of the nodules. Structure of Frankia
nodules was described using histochemical methods to elucidate the nature of
micro-symbiont within the nodules. The nodule consisted of a distinct periderm
enclosing the cortex. The cortex showed patches of infected cells interspersed
among the uninfected ones. Inside the cortex was a stele bound by an endodermis,
which contained high amount of tannin. The micro-symbiont was observed in the
nodule tisues in hyphal form and spore packed sporocorp was also seen in the
cortex. The histochemical tests revealed the presence of proteins, insoluble
polysaccharides and polyphenols.
|ISSN: ||0975-1009 (Online); 0019-5189 (Print)|
|Appears in Collections:||IJEB Vol.44(11) [November 2006]|
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