Researches on plant growth regulators

Veldstra, H.; Booij, H. L.

doi:10.1016/0006-3002(49)90099-2

Cited by 77 publications

(16 citation statements)

References 53 publications

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“…Nitsch et al (17) lowered the node at which the first pistillate flower of Cucurbita pepo L. appeared from the 20th to the 9th node with auxin applications. Promotive effects of auxin on flovering also have been reported in both long and short-day species (4,12,13,15). In contrast, inhibitions have been observed in many cases (10,14).…”

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confidence: 86%

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Differential Effects of 2,3,6-Trichlorobenzoic Acid on Growth and Geotropic Curvature of Avena Coleoptiles

Schrank

1960

Plant Physiol.

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confidence: 86%

“…TClBA apparently functions as an auxin (1,8,9,10,11,12 (fig 8). Second, at 40 C, growth is unaffecte(l by 1 X 10-4 AI TCBA but geotropic curvature is i nihibite(d (fig 6 and 7).…”

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confidence: 99%

Differential Effects of 2,3,6-Trichlorobenzoic Acid on Growth and Geotropic Curvature of Avena Coleoptiles

Schrank

1960

Plant Physiol.

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“…Compound 8 showed the weakest suppressive activity among these and promoted the inhibition of IAA. Furthermore, compound 8 has been reported as an auxin-like growth regulator, similar to cis-CA, 2) in the pea split-stem curvature test, 16) so it may work through different pathways from the other compounds.…”

Section: Resultsmentioning

confidence: 99%

<i>cis</i>-Cinnamic Acid Selective Suppressors Distinct from Auxin Inhibitors

Okuda

Nishikawa

Fukuda

et al. 2014

CHEMICAL & PHARMACEUTICAL BULLETIN

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The activity of cis-cinnamic acid (cis-CA), one of the allelochemicals, in plants is very similar to that of indole-3-acetic acid (IAA), a natural auxin, and thus cis-CA has long been believed to be an analog of auxin. We have reported some structure-activity relationships studies by synthesizing over 250 cis-CA derivatives and estimating their inhibitory activities on root growth inhibition in lettuce. In this study, the compounds that showed low-or no-activity on root growth inhibition were recruited as candidates suppressors against cis-CA and/or auxin and tested for their activity. In the presence of cis-CA, lettuce root growth was inhibited; however, the addition of some cis-CA derivatives restored control-level root growth. Four compounds, (Z)-3-(4-isopropylphenyl)acrylic acid, (Z)-3-(3-butoxyphenyl)acrylic acid, (Z)-3-[3-(pentyloxy)phenyl]acrylic acid, and (Z)-3-(naphthalen-1-yl)acrylic acid were selected as candidates for a cis-CA selective suppressor they allowed the recovery of root growth from inhibition by cis-CA treatment without any effects on the IAA-induced effect or elongating activity by themselves. Three candidates significantly ameliorated the root shortening by the potent inhibitor derived from cis-CA. In brief, we have found some cis-CA selective suppressors which have never been reported from inactive cis-CA derivatives for root growth inhibition. cis-CA selective suppressors will play an important role in elucidating the mechanism of plant growth regulation.

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“…The relationships between toxicity and chain length of the substituent groups in 2-position, as well as the effects of substituent polar groups, indicate that the toxicity of the imidazolines is associated with their surface-active properties. VELDSTRA (8,9) and VELDSTRA and BooiJ (10) 621 PLANT PHYSIOLOGY have emphasized that surface activity is an important property contributing to the activity of plant growth substances. They point out that all active compounds contain both hydrophilic and lipophilic groups and are, therefore, active at water-lipoid interphases.…”

Section: Discussionmentioning

confidence: 99%