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How does stalk anatomy of sugarcane relate to fibre content and strength?

机译:甘蔗的尾部解剖如何与纤维含量和强度有关?

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The dry matter content of the sugarcane stalk consists of soluble sugars and insoluble fibre. Although the fibre content of Saccharum officinarum is typically low, with the introgression of S. spontaneum a wider range of fibre characteristics can be identified in commercial cultivars. These characteristics, including fibre content and fibre strength, can have a profound impact on the millability of the cane. Recently, several high-yielding cultivars were developed with fibre-quality measurements outside the typical range and these were classified as 'soft canes'. Fibre quality is classified using tests that were developed in the 1980s to measure three physical parameters: shear strength, impact resistance, and short-fibre content. These tests are costly and time consuming but provide a useful indicator of the effect of a clone on factory operation and performance. Biochemical analysis has shown that the main components of sugarcane fibre are cellulose (72%) and lignin (21%), which are derived from the plant cell walls. In the sugarcane stalk, the lignin is predominantly located in the thickened cell walls of the peripheral rind tissue, which provides structural support, and in the vascular bundles, which transport water and nutrients. The majority of the stalk consists of the sucrose-storage pith tissue, which has thinner cell walls with a relatively higher content of cellulose. Our study demonstrates that there are significant differences in stalk morphology traits among cultivars with different fibre-quality characteristics. SRA1Φ, a soft cane cultivar, has significantly thinner rind and lower density of vascular bundles indicating a higher ratio of pith area to vascular bundle number. This contrasts with SRA5Φ and Q208Φ, both of which have significantly thicker rinds and higher density of vascular bundles. These stalk-anatomy traits are associated with differences in fibre characteristics and could potentially be used to develop a high-throughput screen for fibre quality in sugarcane.
机译:甘蔗茎的干物质含量由可溶性糖和不溶性纤维组成。虽然Saccharum Officinarum的纤维含量通常很低,但Spontaneum的迟钝是在商业品种中可以鉴定更广泛的纤维特性。这些特性包括纤维含量和纤维强度,可以对甘蔗的少年产生深远的影响。最近,在典型范围之外的纤维质量测量和诸如“柔软的手杖”的纤维质量测量,开发了几种高产品种。使用20世纪80年代开发的测试进行纤维质量进行分类,以测量三个物理参数:剪切强度,抗冲击性和短纤维含量。这些测试昂贵且耗时,但提供了克隆对工厂操作和性能影响的有用指标。生物化学分析表明,甘蔗纤维的主要成分是纤维素(72%)和木质素(21%),其衍生自植物细胞壁。在甘蔗茎中,木质素主要位于外周切割组织的增厚细胞壁中,该组织提供结构载体和血管束,其运输水和营养。大部分茎由蔗糖储存髓组织组成,其具有较薄的细胞壁,其纤维素含量相对较高。我们的研究表明,具有不同纤维质特征的品种中茎形态特征存在显着差异。 SRA1φ,一种软甘蔗栽培品种,具有显着较薄的血管束的血管束的较薄密度,表明PITH面积与血管束数的更高比率。这与SRA5φ和Q208φ形成鲜明对比,两者都具有显着较厚的外皮和较高密度的血管束。这些茎解剖学性状与纤维特性的差异有关,并且可能用于开发甘蔗中的纤维质的高通量筛选。

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