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Pisum sativum wild-type and mutant stipules and those induced by an auxin transport inhibitor demonstrate the entire diversity of laminated stipules observed in angiosperms

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Title Pisum sativum wild-type and mutant stipules and those induced by an auxin transport inhibitor demonstrate the entire diversity of laminated stipules observed in angiosperms
 
Creator Kumar, Arvind
Sharma, Vishakha
Khan, Moinuddin
Tripathi, Bhumi Nath
Kumar, Sushil
 
Subject Angiosperm stipules
1-N-Naphthylphthalamic acid
Pisum sativum
Stipule architecture
Stipule evolution
Stipule anatomy
 
Description Accepted date: 12 March 2012
About a quarter of angiosperm species are stipulate. They produce stipule pairs at stem nodes in association with leaves. Stipule morphology is treated as a species-specific characteristic. Many species bear stipules as laminated organs in a variety of configurations, including laterally free large foliaceous, small, or wholly leaf-like stipules, and as fused intrapetiolar, opposite, ochreate or interpetiolar stipules. In Pisum sativum, the wild-type and stipule-reduced and cochleata mutants are known to form free large, small, and leaf-like stipules, respectively. Auxin controls initiation and development of plant organs and perturbations in its availability and distribution in the meristems, caused by auxin transport inhibitor(s) (ATIs), lead to aberrations in leaf development. The effect(s) of ATI(s) on stipule development are unexplored. To study the effect of the ATI 1-N-naphthylphthalamic acid (NPA) on stipule morphogenesis, P. sativum explants were grown in vitro in presence of a sublethal concentration of NPA. The NPA-treated shoots produced fused stipules of all the different types described in angiosperms. The observations indicate that (a) the gene sets for stipule differentiation may be common in angiosperms and (b) the interspecies stipule architectural differences are due to mutations, affecting gene expression or activity that got selected in the course of evolution.
Grateful thanks are for the director of NIPGR for
providing facilities, the Council of Scientific and Industrial Research
(CSIR), and the Indian National Science Academy for grant of scientistship schemes to SK, CSIR, and SKA Institution for Research, Education
and Development for grant of postgraduate fellowships to AK and VS,
respectively, and for Anand Kumar Sarkar and Bithika Sharma for
reading the draft manuscript and making useful suggestions.
 
Date 2015-11-05T07:07:57Z
2015-11-05T07:07:57Z
2013
 
Type Article
 
Identifier Protoplasma, 250(1): 223-234
1615-6102
http://172.16.0.77:8080/jspui/handle/123456789/326
http://link.springer.com/article/10.1007%2Fs00709-012-0397-3
10.1007/s00709-012-0397-3
 
Language en_US
 
Publisher Springer