Choi Han Gil, Kim Young Sik, Lee Soon Jeong, Nam Ki Wan
J Appl Phycol. 2007 Apr;19(2):131-138. doi: 10.1007/s10811-006-9119-6. Epub 2006 Nov 10.
Monthly growth and reproduction of Undaria pinnatifida sporophytes were examined over a period of 5 months in a cultivation farm in Korea. A total of 11 characters of Undaria were measured to determine a reliable morphological character representing its growth and reproduction. Plant weight of Undaria sporophytes increased steadily over the experimental period, but it increased in four different ways. Undaria pinnatifida increased body weight by growth in length and width (October-early December), and by growth in width with the thickening of blade and stipe when sporophytes began to be fertile (December-January). In the middle of January, growth in length and width had almost stopped with the maturation of Undaria sporophytes. Finally, the weight of Undaria increased again by growth in width at the end of February. Present results indicate that Undaria sporophytes increase body weight by growth in length and width at different times, and the relationship between reproduction and vegetative growth is exclusive. Plant weight was positively correlated and fitted well with stipe width and blade width. The blade of Undaria was very thin (ca. 254 mum) and breakable by wave action, but its stipe was strong and relatively thick (ca. 8.7 mm). Furthermore, the fertility of U. pinnatifida was fitted better with stipe width than blade width. Thus, we suggest that the stipe width is the most feasible character with which to estimate the growth and reproduction of U. pinnatifida sporophytes in the cultivation farm.
在韩国的一个养殖场，对裙带菜孢子体进行了为期5个月的月度生长和繁殖研究。测量了裙带菜总共11个特征，以确定一个可靠的代表其生长和繁殖的形态特征。裙带菜孢子体的植物重量在实验期间稳步增加，但增加方式有四种。裙带菜在10月至12月初通过长度和宽度的生长增加体重，当孢子体开始成熟时，通过叶片和叶柄变厚宽度增加体重（12月至1月）。1月中旬，随着裙带菜孢子体成熟，长度和宽度的生长几乎停止。最后，2月底裙带菜的重量又通过宽度的生长再次增加。目前的结果表明，裙带菜孢子体在不同时间通过长度和宽度的生长增加体重，繁殖与营养生长之间的关系是相互排斥的。植物重量与叶柄宽度和叶片宽度呈正相关且拟合良好。裙带菜的叶片非常薄（约254微米），易被海浪作用折断，但其叶柄坚固且相对较厚（约8.7毫米）。此外，裙带菜的育性与叶柄宽度的拟合度优于叶片宽度。因此，我们认为叶柄宽度是评估养殖场中裙带菜孢子体生长和繁殖最可行的特征。
