SHOOT GROWTH AND HISTOLOGICAL RESPONSE OF DWARF SWEETGUM TO GIBBERELLIN

IF 1.7 4区农林科学 Q2 HORTICULTURE Journal of Horticultural Science & Biotechnology Pub Date : 1999-01-01 DOI:10.1080/14620316.1999.11511163

Sharry E. Sommer, Shazel Y. Wetzstein, S. L. Brown

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引用次数: 3

Abstract

SummaryIn addition to supplying valuable cultivars for ornamental uses, dwarf mutant tree forms may present opportunities for studying the genetic control of physiological factors affecting shoot growth. Few studies have addressed the histogenetic role of GA during shoot development, and its effect on cell pattern in mature internodes. Hence, the growth responses of two genetic dwarf sweetgum trees (Liquidambar styraiflua L. cv. Gumball and an unnamed wild dwarf tree) were examined following foliar application of gibberellic acid (GA) to young preformed leaves. Both were GA-responsive mutants and exhibited marked increases in shoot growth following treatment. GA was effective in 1) stimulating subapical meristem activity in preformed internodes which were initiated the previous season, 2) inducing cell divisions in the apical meristem proper to promote the neoformation of leaves and sylleptic lateral branches, and 3) stimulating subapical mitotic activity in neoformed internodes. Histological evaluations ...

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矮甜菊茎部生长及对赤霉素的组织学反应

除了提供有价值的观赏品种外，矮突变树型可能为研究影响梢生长的生理因素的遗传控制提供机会。很少有研究报道GA在芽发育过程中的组织发生作用及其对成熟节间细胞形态的影响。因此，两种遗传矮化甜树(Liquidambar styraiflua L. cv.)的生长响应。用赤霉素(GA)对预成形幼叶进行叶面施用后，对Gumball和一株未命名的野生矮树进行了研究。这两种突变体都是对ga有反应的突变体，在处理后表现出明显的芽生长增加。GA的作用有:1)刺激前一季开始的预形成节间的尖下分生组织活性;2)诱导顶端分生组织的细胞分裂，促进叶片和分枝的新生;3)刺激新形成节间的尖下有丝分裂活性。组织学评价……

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来源期刊

Journal of Horticultural Science & Biotechnology 农林科学-园艺

CiteScore

3.90

自引率

5.30%

发文量

审稿时长

3 months

期刊介绍： The Journal of Horticultural Science and Biotechnology is an international, peer-reviewed journal, which publishes original research contributions into the production, improvement and utilisation of horticultural crops. It aims to provide scientific knowledge of interest to those engaged in scientific research and the practice of horticulture. The scope of the journal includes studies on fruit and other perennial crops, vegetables and ornamentals grown in temperate or tropical regions and their use in commercial, amenity or urban horticulture. Papers, including reviews, that give new insights into plant and crop growth, yield, quality and response to the environment, are welcome, including those arising from technological innovation and developments in crop genome sequencing and other biotechnological advances.