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You searched for: Source 1997 v.114 no.2 Remove constraint Source: 1997 v.114 no.2 Subject Nicotiana tabacum Remove constraint Subject: Nicotiana tabacum
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1. Importance of the chiral centers of jasmonic acid in the responses of plants. Activities and antagonism between natural and synthetic analogs

Author:
Holbrook, L.; Tung, P.; Ward, K.; Reid, D.M.; Abrams, S.; Lamb, N.; Quail, J.W.; Moloney, M.M.
Source:
Plant physiology 1997 v.114 no.2 pp. 419-428
ISSN:
0032-0889
Subject:
Helianthus annuus; Brassica napus; measurement; chemical degradation; dose response; jasmonic acid; gene expression; Triticum aestivum; Nicotiana tabacum; esters; stereochemistry; enzyme activity; chemical structure; seed germination; transgenic plants; cotyledons; proteinase inhibitors; reporter genes; chemical constituents of plants; chlorophyll; beta-glucuronidase
Abstract:
... The importance of the two chiral centers at C-3 and C-7 in the molecular structure of jasmonic acid in plant responses was investigated. We separated methyl jasmonate (MeJA) into (3R)- and (3S)-isomers with a fixed stereochemistry at C-3, but epimerization at C-7 is possible. The four isomers of the nonepimerizable analog 7-methyl MeJA were synthesized. These six esters and their corresponding aci ...

2. Importin alpha from Arabidopsis thaliana is a nuclear import receptor that recognizes three classes of import signals

Author:
Smith, H.M.S.; Hicks, G.R.; Raikhel, N.V.
Source:
Plant physiology 1997 v.114 no.2 pp. 411-417
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; Nicotiana tabacum; protein composition; protein transport; receptors; binding proteins; protoplasts; plant anatomy; plasma membrane
Abstract:
... Protein import into the nucleus is a two-step process. In vitro import systems from vertebrate cell extracts have shown that several soluble factors are required. One of these factors is the receptor importin alpha, which binds to nuclear localization signals (NLS) in vitro. We previously cloned an importin alpha homolog from Arabidopsis thaliana (At-IMP alpha) and demonstrated that this protein w ...
PubMed:
9193081
PubMed Central:
PMC158320

3. Influence of environmental stress on biomass partitioning in transgenic tobacco plants expressing the movement protein of tobacco mosaic virus

Author:
Balachandran, S.; Hull, R.J.; Martins, R.A.; Vaadia, Y.; Lucas, W.J.
Source:
Plant physiology 1997 v.114 no.2 pp. 475-481
ISSN:
0032-0889
Subject:
Nicotiana tabacum; transgenic plants; gene expression; genetic vectors; Tobacco mosaic virus; viral proteins; nutrient transport; roots; shoots; water stress; nutrient deficiencies; nitrogen; potassium; phosphorus; source-sink relationships; genetic variation; translocation (plant physiology); genotype; photosynthates; stress response
Abstract:
... The influence of various environmental factors on biomass partitioning between shoots and roots in transgenic tobacco (Nicotiana tabacum) plants expressing the movement protein (MP) of tobacco mosaic virus (TMV) was investigated. TMV-MP-expressing transgenic plants exhibited a root-to-shoot ratio that was approximately 40% below that of transgenic vector control plants. When transgenic plants expr ...

4. Overproduction of ascorbate peroxidase in the tobacco chloroplast does not provide protection against ozone

Author:
Torsethaugen, G.; Pitcher, L.H.; Zilinskas, B.A.; Pell, E.J.
Source:
Plant physiology 1997 v.114 no.2 pp. 529-537
ISSN:
0032-0889
Subject:
genetic transformation; gene transfer; biosynthesis; phytotoxicity; gas exchange; transgenic plants; Agrobacterium radiobacter; stress response; ozone; measurement; Nicotiana tabacum; enzyme activity; peroxidase; antioxidants; chloroplasts; ascorbic acid
Abstract:
... Transgenic tobacco (Nicotiana tabacum cv Bel W3) plants were used to test the hypothesis that protection from O3 injury could be conferred by overproduction of ascorbate peroxidase (APX) in the chloroplast. The 10-fold increase in soluble APX activity in the chloroplast was expected to alleviate an implied increase in oxidative potential and prevent damage caused by O3. Three different O3 exposure ...