Table 1 Chemical Structures and comparison of 22 hit compounds demonstrated either inhibitory (I-) or stimulatory (S-) effects in pollen tube assay with respect to their effects in root growth assays

I-01

4‐({6‐[(3‐bromophenyl) amino]‐[1,2,5] oxadiazolo [3,4‐b] pyrazin‐5‐yl} amino) phenol

4,76 %, (p < 0.05)

I-02

(4E)‐1‐(3,4‐dichlorophenyl)‐4‐[(4‐hydroxy‐3‐iodo‐5‐methoxyphenyl) methylidene]‐3‐methyl‐4,5‐dihydro‐1H‐pyrazol‐5‐one

6,40 %, (p < 0.05)

I-03

(5E)-5-[(4-fluorophenyl) methylidene]-3-[(4-iodoanilino) methyl]-1,3-thiazolidine-2,4-dione

7,10 %, (p < 0.05)

I-04

2‐(4‐{[(2Z,5Z)‐4‐oxo‐3‐phenyl‐2‐(phenylimino)‐1,3‐thiazolidin‐5‐ylidene] methyl} phenoxy) acetic acid

7,36 %, (p < 0.05)

I-05

ethyl 4-[3-[(3-bromophenyl) methyl]-4-oxo-2-sulfanylidene-1H-quinazoline-7-carbonyl] piperazine-1-carboxylate

8,96 %, (p < 0.05)

I-06

3,4-dihydro-2H-quinolin-1-yl-[3-(4-phenylpiperazin-1-yl) sulfonylphenyl] methanone

9,60 %, (p < 0.05)

I-07

2-chloro-5-[(4Z)-4-[(3-methoxy-4-phenylmethoxyphenyl) methylidene]-3-methyl-5-oxopyrazol-1-yl] benzoic acid

9,92 %, (p < 0.05)

I-08

(4Z)-4-[(2-methoxy-1-naphthyl) methylene]-2-(4-methoxy-3-nitrophenyl)-1,3-oxazol-5 (4H)-one

11,52 %, (p < 0.05)

I-09

4-[(4E)-4-[(4,5-dimethoxy-2-nitrophenyl) methylidene]-3-methyl-5-oxopyrazol-1-yl] benzoic acid

12,16 %, (p < 0.05)

I-10

N-[(5Z)-5-[(3,4-dimethoxyphenyl) methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]-3-nitrobenzamide

14,19 %, (p < 0.05)

I-11

(4E)-2-(3,4-dichlorophenyl)-4-[(3,4-dimethoxyphenyl) methylidene]-5-methylpyrazol-3-one

14,41 %, (p < 0.05)

I-12

2-phenylethyl 7-(4-chlorophenyl)-4-(4-hydroxy-3-methoxyphenyl)-2-methyl-5-oxo-4,6,7,8-tetrahydro-1H-quinoline-3-carboxylate

16,33 %, (p < 0.05)

I-13

4-[[2-bromo-4-[(2,4,6-trioxo-1,3-diazinan-5-ylidene) methyl] phenoxy] methyl] benzoic acid

16,97 %, (p < 0.05)

I-14

methyl 4-[[(5E)-5-[(4-methylsulfanylphenyl) methylidene]-2,4-dioxo-1,3-thiazolidin-3-yl] methylamino] benzoate

17,70 %, (p < 0.05)

I-15

4-[4-(dimethylamino) phenyl]-8-{(E)-1-[4-(dimethylamino) phenyl] methylidene}-3,4,5,6,7,8-hexahydro-2 (1H)-quinazolinethione

19,74 %, (p < 0.05)

I-16

[3-(1,3-benzodioxol-5-yl)-2-methyl-4-oxo-6-propylchromen-7-yl] acetate

27,09 %, (p < 0.05)

I-17

2-(7,7-dimethyl-3-oxobicyclo [2.2.1] hept-2-yliden)-N-(4-methylphenyl)-1-hydrazinecarbothioamide

29,82 %, (p < 0.05)

I-18

2-(9H-xanthen-9-yl)-1H-indene-1,3 (2H)-dione

48,49 %, (p < 0.05)

I-19

2-{4-[(isopentyloxy) carbonyl] phenyl}-1,3-dioxo-5-isoindolinecarboxylic acid

49,20 %, (p < 0.05)

S-01

4-[bis (2-methoxyethyl) sulfamoyl]-N-[4-(4-nitrophenyl)-1,3-thiazol-2-yl] benzamide

119,09 %, (p < 0.05)

S-02

(3-Chloro-1-benzothiophen-2-yl) (10,11-dihydro-5H-dibenzo [b,f] azepin-5-yl) methanone

126,24 %, (p < 0.05)

S-03

N-[4-(4-methylphenyl)-1,3-thiazol-2-yl]-2-phenoxybenzamide

129,23 %, (p < 0.05)