首页> 外文期刊>European Journal of Agronomy >Morphological and anatomical modifications in winter barley culm after late plant growth regulator treatment.
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Morphological and anatomical modifications in winter barley culm after late plant growth regulator treatment.

机译:后期大麦生长调节剂处理后冬大麦茎的形态和解剖学变化。

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One of the major factors limiting yield production in barley (Hordeum vulgare) has been its poor stem strength. Consequently, a greater stiffness of the upper part of the culm is desirable. The effect of a late application of a combination of chlormequat, ethephon and imazaquin on the morphological and anatomical characteristics of barley main stems was investigated. In a field trial near Nancy, France and a greenhouse experiment, a foliar treatment was applied to two-row winter barley cv. Labea atFeekes growth stage 7. Measurements of plant height, internode lengths, dry weights and microscopic examination of cross-sections of the top three internodes were made at anthesis. The plant growth regulator (PGR) treatment decreased plant height by reducing the length of the upper internodes. The PGR did not modify the total weight of the upper internodes, but induced an increase of the dry weight per unit length of the main stem. The shortening of the internodes combined with the higher density of the tissues contributed to the stiffness of the stem. This was confirmed by anatomical studies which showed the modifications of the supporting tissues. The application of the plant growth regulator did not affect grain yield.
机译:限制大麦(Hordeum vulgare)产量的主要因素之一是其茎强度差。因此,期望杆的上部更大的刚度。研究了后期施用六氯麦草,乙烯利和伊马喹喹对大麦主茎的形态和解剖学特征的影响。在法国南锡附近的田间试验和温室试验中,对两行冬季大麦简历进行了叶面处理。 Labea atFeekes生长阶段7.在开花时,测量了株高,节间长度,干重以及对顶部三个节间的横截面进行了显微镜检查。植物生长调节剂(PGR)处理通过减少上节间长度来降低植物高度。 PGR不会改变上部节间的总重量,但会导致主茎每单位长度的干重增加。节间的缩短与较高的组织密度相结合,有助于茎的刚度。解剖学研究证实了这一点,该研究显示了支持组织的改变。使用植物生长调节剂不会影响谷物产量。

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