{'fraction_non_alphanumeric': 0.033047735618115054, 'fraction_numerical': 0.022031823745410038, 'mean_word_length': 5.440944881889764, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Influence of Borate and Pentaerythritol Concentrations on Germination and Tube Growth of Lilium longiflorum Pollen1


Rapid tube growth occurred when lily (Lilium longiflorum Thunb. cv. Ace) pollen germinated in a liquid medium containing 0.29 m pentaerythritol. Growth was reduced by increasing or decreasing the pentaerythritol concn. There was a hyperbolic relationship between concn of H3BO3 in the medium and stimulation in rate of pollen tube growth, with 30 μm H3BO3 causing one-half maximal stimulation of growth. Neither early pollen tube growth nor percent germination was stimulated by the hormones indoleacetic acid and gibberellic acid, nor was there any effect by 2’-isopropyl-4’-(trimethylammonium chloride)-5’-methylphenyl piperidine-1-carboxylate (Amo 1618), an inhibitor of gibberellin biosynthesis.