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作物学报 ›› 2008, Vol. 34 ›› Issue (05): 859-869.doi: 10.3724/SP.J.1006.2008.00859

• 耕作栽培·生理生化 • 上一篇    下一篇

棉花季节桃加厚发育生理特性的差异及与纤维比强度的关系

张文静1,2;胡宏标1;陈兵林1;王友华1;周治国1,*   

  1. 1南京农业大学 / 农业部作物生长调控重点开放实验室, 江苏南京210095; 2 安徽农业大学农学院, 安徽合肥230036
  • 收稿日期:2007-03-27 修回日期:1900-01-01 出版日期:2008-05-12 网络出版日期:2008-05-12
  • 通讯作者: 周治国

Difference of Physiological Characteristics of Cotton Bolls in Development of Fiber Thickening and Its Relationship with Fiber Strength

ZHANG Wen-Jing12,HU Hong-Biao1,CHEN Bing-Lin1,WANG You-Hua1,ZHOU Zhi-Guo1*   

  1. 1 Key Laboratory of Crop Growth Regulation, Ministry of Agriculture / Nanjing Agricultural University, Nanjing 210095, Jiangsu, 2 College of Agronomy, Anhui Agricultural University, Hefei 230036, Anhui, China
  • Received:2007-03-27 Revised:1900-01-01 Published:2008-05-12 Published online:2008-05-12
  • Contact: ZHOU Zhi-Guo

摘要: 选用3类棉纤维比强度差异明显的4个棉花品种, 研究棉花伏前桃、伏桃、早秋桃和晚秋桃纤维加厚发育过程中主要生理特征的差异及与纤维比强度的关系。结果表明, 棉花季节桃纤维加厚发育过程中物质转化特征和相关酶活性存在较大差异, 最终导致纤维比强度差异的形成, 且季节桃间的差异在各类品种内表现一致。伏前桃和伏桃纤维加厚发育处于较为适宜的温度条件(铃龄10~50 d日均温26.0~28.5℃)和棉株生理年龄(3~9果枝)下, 纤维素合成相关酶活性越高, 相关物质转化越多, 纤维素快增持续期长, 纤维素累积速率平缓, 越利于高强纤维的形成。早秋桃纤维发育后期温度条件较伏前桃差且棉株开始衰老, 但其纤维合成相关物质转化率高, 纤维素累积特征优于伏前桃, 最终纤维强度高于伏前桃; 随着铃龄10~50 d日均温降至20℃以下和棉株进一步的衰老(16果枝以上), 晚秋桃纤维素快速累积期延长, 相关物质转化率降低, 纤维累积速率过慢, 纤维细胞发育迟缓, 造成最终纤维比强度较低。

关键词: 棉花, 季节桃, 纤维加厚发育, 生理特性, 纤维比强度

Abstract: Fiber strength is one of the most important quality indexes of cotton (Gossypium) fiber and contributes highly to the yarn strength. Normally, fiber strength is determined by fiber’s secondary wall thickening stage in which many complex physiological and biochemical processes are involved. To investigate the physiological characteristic of cotton fiber thickening in seasonal bolls and its relationship with fiber strength, the experiments were carried out in Nanjing, Jiangsu Province in 2004–2005 by choosing four cultivars with significant difference in fiber strength as materials. Boll samples were labeled on anthesis day (July 15, July 25, Aug. 25, and Sept. 10) and expressed as PSB (pre-summer boll), SB (summer boll), EAB (early autumn boll) and LAB (late autumn boll), respectively. The results of two-year experiments showed that there were great differences in matter transformation and related enzyme activities during cotton fiber thickening in seasonal bolls, and which resulted in different fiber strengths. The diversity of physiological indexes between bolls with different anthesis dates was similar in every cultivar (genotype). Under suitable temperature condition (mean daily temperature 26.0–28.5℃ during boll age from 10 to 50 days) and plant physiological age (about the third-ninth fruit branch), the cotton seasonal bolls (PSB and SB), which had more soluble sugar and sucrose transformed, higher β-1,3-glucan content at the onset of the secondary wall thickening, and higher activities of sucrose synthetase and β-1,3-glucanase, would get longer and tempered cellulose accumulation and higher strength fiber. EAB had worse temperature environment for fiber development than PSB during the later period, but it had higher matter transformation rate and better characteristic of cellulose deposition than PSB. As the result, fiber strength of EAB was higher than that of PSB. With the worse temperature condition (mean daily temperature lower than 20℃ during boll age from 10 to 50 days) and cotton plant se-nescence (above the sixteenth fruit branch), LAB had the longest period for cellulose rapid deposition, the lowest matter transfor-mation rate and cellulose accumulation speed. And all these resulted in the lowest fiber strength.

Key words: Cotton, Cotton seasonal boll, Cotton fiber thickening development, Physiological characters, Fiber strength

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