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首页> 外文期刊>Estuarine Coastal and Shelf Science >Application of plant growth regulators, a simple technique for improving the establishment success of plant cuttings in coastal dune restoration
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Application of plant growth regulators, a simple technique for improving the establishment success of plant cuttings in coastal dune restoration

机译：植物生长调节剂的应用，一种简单的技术，可提高沿海沙丘恢复中植物cutting插的建立成功率

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Exogenous application of plant growth regulators (PGRs) may be an effective technique for increasing the rooting ability and the growth of vegetative fragments (cuttings) of plants used in dune restoration programs. Various concentrations (0, 50 and 100 mg 1 ~1) of two auxins, alpha-naphtaleneacetic acid (NAA) and indole-3-butyric acid (IBA), and two cytokinins, 6-furfurylaminopurine (Kinetin) and 6-benzylaminopurine (BAP), were applied separately to cuttings of two widely used species for restora-tion, Ammophila arenaria and Sporobuls virginicus. Root development and production of new buds in cuttings were examined under laboratory conditions one month after application. Cuttings were also examined one year after transplanting into a sandy substratum under natural conditions, to test for possible long term effects of PGRs on plant establishment success and growth. The response of the two study species to PGRs differed substantially. In A arenaria the auxin NAA at 100 mg 1 ~1 reduced the time for root initiation and increased the rooting capacity of cuttings, while the cytokinin Kinetin at 50 mg 1 ~1 facilitated root growth. No auxin had effect on rooting or growth of S. virginicus cuttings, but treatment with 100 mg 1 ~1 Kinetin resulted in higher rooting success than the control. One year after planting, the cuttings of A arenaria treated with 100 mg 1 ~1 NAA showed a higher establishment success (90% vs. 55%) and produced more culms and longer roots than the control; those treated with cytokinins did not differ in the establishment success from the control, but had longer roots, more culms and rhizomes. On the other hand, the cuttings of S. virginicus treated with 100 mg 1 ~1 Kinetin showed a higher establishment success (75% vs. 35%) and had more culms than the control. Therefore, in restoration activities that involved A arenaria, a pre-treatment of cuttings with NAA would be beneficial, as it allows the production of a higher number of well-developed plants with high survival potential and greater area cover. In contrast, a pre-treatment of cuttings of S. virginicus with Kinetin would achieve more acceptable plant survival rates. This easy and low cost-effective technique may be extended to other dune plant species and applied on a large scale to improve the chance of dune restoration success.
机译：外源应用植物生长调节剂（PGR）可能是一种有效的技术，可提高沙丘恢复计划中所用植物的生根能力和营养片段（切屑）的生长。各种浓度（0、50和100 mg 1〜1）的两种生长素，α-萘乙酸（NAA）和吲哚-3-丁酸（IBA）以及两种细胞分裂素，6-糠基氨基嘌呤（Kinetin）和6-苄基氨基嘌呤（ BAP），分别应用于两种广泛用于恢复的物种的插条：沙门氏菌和维京孢子。施药一个月后，在实验室条件下检查插条的根系发育和新芽的产生。在自然条件下移植到沙质基质中一年后，还对插条进行了检查，以测试PGR对植物建立成功和生长的长期影响。两种研究物种对PGR的反应差异很大。在沙参中，生长素NAA 100 mg 1〜1减少了根部萌生的时间并增加了插条的生根能力，而细胞分裂素激动素50 mg 1〜1促进了根的生长。生长素没有作用于维吉尼亚链霉菌插条生根或生长，但用100 mg 1〜1 Kinetin处理比对照生根效果更高。播种一年后，与对照相比，用100 mg 1〜1 NAA处理的沙参的插穗表现出更高的建立成功率（90％比55％），并且产生了更多的茎和更长的根。用细胞分裂素处理的那些与对照组相比在建立成功方面没有差异，但是根更长，茎和根茎更多。另一方面，用100 mg 1〜1 Kinetin处理的初生链霉菌的插条显示出较高的建立成功率（75％比35％），并且茎比对照更高。因此，在涉及沙参的恢复活动中，用NAA对插条进行预处理将是有益的，因为它可以生产更多具有高存活潜力和更大面积的发达植物。相反，用Kinetin预处理初生链霉菌的插条将获得更可接受的植物存活率。这种简单且成本低廉的技术可以扩展到其他沙丘植物物种，并且可以大规模应用以提高沙丘修复成功的机会。

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