. The chemistry and mode of action of plant growth substances; proceedings of a symposium held at Wye College, University of London, July 1955. Plant regulators; Auxin; Growth (Plants). On form and function of plant growth substances in the straight growth test (see Figure 3 and Table 1). So apparently the restriction of substitution in the 4-position is not an absolute one, but one of maximal (very small) size of the {a) Figure 3. Pea test. (h) {a) 2:3:6-trichlorobenzoic acid: 50,25, W. 4.\0~'^ moljl. {b) VII: 50, 25, 10, wo///. When surveying the available data on substi
. The chemistry and mode of action of plant growth substances; proceedings of a symposium held at Wye College, University of London, July 1955. Plant regulators; Auxin; Growth (Plants). On form and function of plant growth substances in the straight growth test (see Figure 3 and Table 1). So apparently the restriction of substitution in the 4-position is not an absolute one, but one of maximal (very small) size of the {a) Figure 3. Pea test. (h) {a) 2:3:6-trichlorobenzoic acid: 50,25, W. 4.\0~'^ moljl. {b) VII: 50, 25, 10, wo///. When surveying the available data on substituted benzoic acids, in our opinion the most plausible conclusions can be summarized as follows: (i) Activity is dependent on a non-flat structure, caused by diortho substituents of such a size that the COOH group is 7iot masked. Table 1 Avena straight growth. Percentage elongation. The mean of 20 sections of initial length 4 mm, measured after 24:-hour test Concentration {mollL) Compound Buffer lAA \0-^molll. 10-s lO-'^ 10-^ ^ 10-3 10-2 II 38 73 40 40 40 17 III 44 80 53 53 48 28 IV 40 68 40 33 20 13 VI 25 70 23 20 30 33 VII 35 100 33 43 68 60 VIII 38 83 55 78 83 63 XI. CI 46 110 40 (38 65 40 XIV 40 93 25 48 65 40 XVI 35 100 40 55 93 88 XVII 35 95 33 38 43 63 XIX 36 93 49 40 23 18 XX 40 93 34 36 41 33 XXI 35 83 35 40 28 23 XXII 30 70 38 65 48 30 XXIII 35 100 33 35 98 93 XXIV 33 103 51 78 123 45 XXVI 38 50 63 58 XXIX 43 98 48 54 55 93 XXX 45 135 55 98 140 140 121. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wye College; Wain, R. L; Wightman, F. (Frank). London, Butterworths Scientific Publications
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