Coordination between plant and apex development in Hordeum vulgare ssp. distichum

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• 作者：Iduna Arduini ; Laura Ercoli ; Marco Mariotti ; Aless ; ro Masoni
• 关键词：Barley ; Haun stage ; Primordia initiation ; Sowing date ; Variety
• 刊名：Comptes Rendus Biologies
• 出版年：2010
• 出版时间：May 2010
• 年：2010
• 卷：333
• 期：5
• 页码：454-460
• 全文大小：430 K

文摘

Developmental scales for cereals describe apex and plant morphology separately. In order to link crucial steps of internal and external development, in three varieties of Hordeum vulgare spp. distichum L., sown in autumn and in spring, we recorded plant, leaf and apex stage, following the scales of Zadoks, Haun, and Banerjee and Wienhues, the number of primordia, culm and spike length, and the final number of leaves and spikelets. Primordia initiation was coordinated with leaf appearance and the relative rate was constant for the initiation of productive primordia. The maximum number of primordia was achieved just before the first node became detectable, but development was completed only by those initiated before floret differentiation and internode distension started. The first spikelet was initiated when the third leaf tip became visible, and the last one when plants were at the pseudo stem erection stage and five leaves had still to appear.