Development of Tuberous Cassava Roots under Different Tillage Systems: Descriptive Anatomy
Development of Tuberous Cassava Roots under Different Tillage Systems: Descriptive Anatomy
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DOI：
10.1626/pps.18.241
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发表时间：
2015-07-01
影响因子：
2.5
通讯作者：
Aguiar, Eduardo Barreto
中科院分区：
文献类型：
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作者：
Figueiredo, Priscila Gonzales;de Moraes-Dallaqua, Marina Aparecida;Aguiar, Eduardo Barreto
木薯（Manihot esculenta Crantz）根系与土壤物理性质之间的相互作用已经被分析过。这种相互作用导致植物物质生产和根系理化特征的差异，表明土壤物理条件的变化可能与根系解剖结构的变化有关。本研究描述了木薯块根的解剖发育。IAC 576-70)。在种植后15、30、60、90、120、150和180天（DAP）对三种不同耕作制度（最少耕作、常规耕作和免耕作）下生长的根系进行了检测。在根系发育过程中，耕作制度对根系解剖结构没有影响；在15和30时，DAP的根有较早的次生生长；60 DAP开始块茎形成过程；在90dap时，次生木质部已经完全分化，可以储存淀粉；在120、150和180 DAP时，根的解剖结构与90 DAP时相似。从这些结果我们得出结论，木薯块根的解剖结构是由90 DAP建立的，组成块根的组织的建立和发育顺序在前180 DAP期间不受耕作制度的影响。
The interaction between the roots of cassava (Manihot esculenta Crantz) and soil physical properties has previously been analyzed. This interaction results in differences in production of plant material and in the physicochemical features of the roots, suggesting that changes in soil physical conditions may be related to changes in root anatomy. This work described the anatomical development of the tuberous cassava roots (cv. IAC 576-70) under different tillage systems. Roots grown under three different tillage systems (minimum, conventional and no tillage) were examined at 15, 30, 60, 90, 120, 150 and 180 days after planting (DAP). The tillage systems did not appear to influence root anatomy during root development; at 15 and 30 DAP roots had early secondary growth; at 60 DAP the process of tuber formation had started; at 90 DAP the secondary xylem had completely differentiated to allow storage of starch; at 120, 150 and 180 DAP roots exhibited a similar anatomical structure to that observed at 90 DAP. From these results we conclude that the anatomical structure of cassava tuberous roots is established by 90 DAP and the sequence of establishment and development of tissues that make up the tuberous roots is not influenced by tillage systems during the first 180 DAP.