Effect of the Root System on Tomato Stem Growth

Went, F. W.

doi:10.1104/pp.18.1.51

Cited by 67 publications

(17 citation statements)

References 9 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It appears that the "efficiency" of a root system must be measured by other techniques than recording top-root ratio; possibly by such studies as those by WENT (12). He has concluded "that less than ten per cent.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Top Environment and Flowering Upon Top-Root Ratios

Roberts

Struckmeyer

1946

Plant Physiol.

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

The Effect of Top Environment and Flowering Upon Top-Root Ratios

Roberts

Struckmeyer

1946

Plant Physiol.

View full text Add to dashboard Cite

“…Split-root experiments in drought conditions and drought-inducible maize (Zea mays) root signals indicate that roots generate uncharacterized droughtinducible signals that move to the aerial parts of the plant and confer drought resistance to the shoots (Went, 1943;Passioura, 1988;Saab and Sharp, 1989;Gowing et al, 1990;Chazen and Neumann, 1994). Previous studies also have elucidated structural adaptations of root architecture to overcome drought stress.…”

mentioning

confidence: 99%

Overexpression of the OsERF71 Transcription Factor Alters Rice Root Structure and Drought Resistance

et al. 2016

View full text Add to dashboard Cite

Plant responses to drought stress require the regulation of transcriptional networks via drought-responsive transcription factors, which mediate a range of morphological and physiological changes. AP2/ERF transcription factors are known to act as key regulators of drought resistance transcriptional networks; however, little is known about the associated molecular mechanisms that give rise to specific morphological and physiological adaptations. In this study, we functionally characterized the rice (Oryza sativa) drought-responsive AP2/ERF transcription factor OsERF71, which is expressed predominantly in the root meristem, pericycle, and endodermis. Overexpression of OsERF71, either throughout the entire plant or specifically in roots, resulted in a drought resistance phenotype at the vegetative growth stage, indicating that overexpression in roots was sufficient to confer drought resistance. The root-specific overexpression was more effective in conferring drought resistance at the reproductive stage, such that grain yield was increased by 23% to 42% over wild-type plants or whole-body overexpressing transgenic lines under drought conditions. OsERF71 overexpression in roots elevated the expression levels of genes related to cell wall loosening and lignin biosynthetic genes, which correlated with changes in root structure, the formation of enlarged aerenchyma, and high lignification levels. Furthermore, OsERF71 was found to directly bind to the promoter of OsCINNAMOYL-COENZYME A REDUCTASE1, a key gene in lignin biosynthesis. These results indicate that the OsERF71-mediated drought resistance pathway recruits factors involved in cell wall modification to enable root morphological adaptations, thereby providing a mechanism for enhancing drought resistance.

show abstract

“…Van Overbeek (11) found that removal of the roots of the Avena seedling brought about a similar decrease in auxin production and an increase in the curvature response of the coleoptile to unilaterally applied auxin. Subsequently Went (13,14) showed that, in tomatoes, shoot growth is dependent upon hormone-like substances supplied by the root. Mothes and co-workers (3,8) For experiments on the effect of cytokinins on auxin secretion from coleoptile tips, the ethanol-carbowax solutions were applied to the tips either after 56 to 60 hr of growth or just 5 min before excision of the tips.…”

mentioning

confidence: 99%

Effects of Cytokinins on Growth and Auxin in Coleoptiles of Derooted Avena Seedlings

Jordan

Skoog

1971

Plant Physiol.

View full text Add to dashboard Cite

It is known that removal of the endosperm (deseeding) reduces subsequent auxin production in the oat coleoptile tip and the "regeneration of the physiological tip" (auxin production) in the decapitated coleoptile as determined by the For experiments on the effect of cytokinins on auxin secretion from coleoptile tips, the ethanol-carbowax solutions were applied to the tips either after 56 to 60 hr of growth or just 5 min before excision of the tips. For each treatment 36 2-mm tips were excised with a scalpel after 72 to 74 hr of growth and arranged basal end down on 0.1 5-ml agar platelets. Every hour for 5 hr each set of tips was transferred to a fresh platelet. Each platelet was then divided into 12 blocks for auxin assays by the A vena curvature test.The assay was performed in the standard way (15) with uniform plants selected from the same batch of seedlings from which the experimental plants had been selected. During the assay the relative humidity in the Avena room was maintained near 88%. For quantitation of the response each assay included a standard series of IAA concentrations. RESULTSAs illustrated by a typical experiment (Fig. 1), increase in length of the measured apical portion of the coleoptiles was about 50% less in derooted plants in the 20 hr following derooting than in intact controls. In coleoptiles of derooted plants supplied with 2iP immediately upon derooting the increase was about the same as in intact controls. The increase in intact plants treated with 2iP was only slightly greater than in intact controls. Thus treatment with cytokinin overcomes the effect of * Abbreviations: 2iP: 6-(3-methyl-2-butenylamino)purine; BAP: 6-benzylaminopurine. 97www.plantphysiol.org on May 9, 2018 -Published by Downloaded from

show abstract

Effect of the Root System on Tomato Stem Growth

Cited by 67 publications

References 9 publications

The Effect of Top Environment and Flowering Upon Top-Root Ratios

The Effect of Top Environment and Flowering Upon Top-Root Ratios

Overexpression of the OsERF71 Transcription Factor Alters Rice Root Structure and Drought Resistance

Effects of Cytokinins on Growth and Auxin in Coleoptiles of Derooted Avena Seedlings

Contact Info

Product

Resources

About