Zhou Qing, Wang You-hua, Xu Nai-yin, Zhang Chuan-xi, Zhou Zhi-guo, Chen Bing-lin
Ministry of Agriculture Key Laboratory of Crop Growth Regulation, Nanjing Agricultural University, Nanjing 210095, China.
Ying Yong Sheng Tai Xue Bao. 2009 Jan;20(1):149-56.
Taking two cotton cultivars with different fiber strength (KC-1, average fiber strength 35 cN x tex(-1); and AC-33B, average fiber strength 32 cN x tex(-1)) as test materials, a field experiment with two planting dates (25 April and 25 May) was conducted in Nanjing of Jiangsu (lower reaches of Yangtze River Valley) and Xuzhou of Jiangsu (Yellow River Valley) to study the dynamic changes of plant sucrase, sucrose synthase, sucrose phosphate synthase, and beta-1,3-glucanase activities during the development of cotton fiber at different air temperatures and their relationships with fiber length and strength. In the development period of fiber elongation, sucrase and beta-1,3-glucanase activities were higher; while during the period of fiber thickening, sucrose synthase and sucrose phosphate synthase activities increased rapidly and were high, but sucrase and beta-1,3-glucanase activities had a rapid decrease. The higher sucrase activity in fiber elongation development period favored the fiber length development, while the rapid increase of sucrose synthase and sucrose phosphate synthase and the rapid decrease of sucrase and beta-1,3-glucanase activity favored the development of fiber strength. For cotton variety KC-1, the sucrase and beta-1,3-glucanase activities in its early development period and the sucrose synthase and sucrose phosphate synthase activities in its middle and later development periods were all higher than those of AC-33B. In this study, 23.3 degrees C was the optimal temperature for high strength fiber formation, and 23.3 degrees C - 25.5 degrees C was the optimal temperature for long length fiber formation.
以两个纤维强度不同的棉花品种（KC - 1，平均纤维强度35厘牛/特克斯；AC - 33B，平均纤维强度32厘牛/特克斯）为试验材料，在江苏南京（长江流域下游）和江苏徐州（黄河流域）进行了两个播期（4月25日和5月25日）的田间试验，研究不同气温下棉花纤维发育过程中植株蔗糖酶、蔗糖合成酶、蔗糖磷酸合成酶和β - 1,3 - 葡聚糖酶活性的动态变化及其与纤维长度和强度的关系。在纤维伸长发育期，蔗糖酶和β - 1,3 - 葡聚糖酶活性较高；而在纤维加厚期，蔗糖合成酶和蔗糖磷酸合成酶活性迅速增加且较高，但蔗糖酶和β - 1,3 - 葡聚糖酶活性迅速下降。纤维伸长发育期较高的蔗糖酶活性有利于纤维长度发育，而蔗糖合成酶和蔗糖磷酸合成酶的迅速增加以及蔗糖酶和β - 1,3 - 葡聚糖酶活性的迅速下降有利于纤维强度发育。对于棉花品种KC - 1，其发育前期的蔗糖酶和β - 1,3 - 葡聚糖酶活性以及发育中后期的蔗糖合成酶和蔗糖磷酸合成酶活性均高于AC - 33B。本研究中，23.3℃是高强度纤维形成的最佳温度，23.3℃ - 25.5℃是长纤维形成的最佳温度。
