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Nodal spine pairs present in the mimosoid Prosopis juliflora are not stipules but define a distinct class of lateral organs

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Title Nodal spine pairs present in the mimosoid Prosopis juliflora are not stipules but define a distinct class of lateral organs
 
Creator Sharma, Vishakha
Kumar, Sushil
 
Subject Lateral Organs
Leaf
Mimosoideae
Pisum sativum
Spines
Stipules
 
Description Accepted date: June 23rd, 2012
The descriptions of Prosopis juliflora of subfamily mimosoideae in the family leguminosae, given in the floras of arid and semi-arid regions of the world, including the flora of Delhi, state that the spine pairs seen in association with compound leaf on nodes are stipules. The suggestions that spines are stipules were tested by morphological and histological examination of nodes of P. juliflora plants growing in the Arawalli range at New Delhi. The nascent nodes on growing branches of P. juliflora were observed to produce a pair of knife-like free bifacial stipules together with a leaf and a pair of spines. The stipules were missing from the mature nodes of the same branches whose young nodes carried stipule pairs, suggesting that the stipules were deciduous whereas leaves and spines were persistent. Anatomically, spines were observed to be appendages to stem and located adjacent to leaf petiole away from stipules. Vasculature of stipules was independent. The observations allowed the conclusion that P. juliflora nodes form regular stipules and spines produced on them are stem-like distinct lateral organs. It is suggested that nodal spine pairs borne on plant nodes in general are lateral organs different from stipules, leaves and secondary inflorescences.
Grateful thanks are due to the Director of the institute for
providing facilities and to Indian National Science Academy for scientist-ship to SK and SKA Institution for
Research, Education and Development for post graduate
fellowship to VS.
 
Date 2015-10-29T09:07:19Z
2015-10-29T09:07:19Z
2012
 
Type Article
 
Identifier American Journal of Plant Sciences, 3(8): 1159- 1161
2158-2750
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=22199
http://172.16.0.77:8080/jspui/handle/123456789/282
 
Language en_US
 
Publisher Scientific Research Publishing Inc.