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抗坏血酸在植物体内的作用是非常广泛的,它能促进呼吸、光合磷酸化,也促进植物的生长和受精,提高产量,有些人甚至把它列为植物激素之一。本试验目的是要了解抗坏血酸对水稻秧苗生长的影响,寻找最适抗坏血酸浓度,为培育壮秧提供理论根据。一、秧苗不同时期的抗坏血酸含量以粳稻(台中39)和籼稻(广场13)为材料,测定幼苗不同时期的抗坏血酸含量。抗坏血酸测定是用2.6—二氧靛酚法。从表1可知,在种子中测不出抗坏血酸。发芽后,随着发芽进程,抗坏血酸含量越高,因为发芽以后,代谢加强,幼苗合成的抗坏血酸就多,小麦等作物也有相同结果。由于系统发育的缘故,粳稻的耐寒性大于釉稻,可是本试验的籼稻抗坏血酸含量高于粳稻。由此可见,耐寒性强的水稻品种的抗坏血酸含量,不一定高于耐寒性弱的水稻品种。
Ascorbate plays a very extensive role in plants. It promotes respiration, photosynthetic phosphorylation, promotes plant growth and fertilization, increases production, and some people even list it as one of the plant hormones. The purpose of this experiment is to understand the impact of ascorbic acid on the growth of rice seedlings, to find the best concentration of ascorbic acid, to provide theoretical basis for cultivating strong seedlings. First, the ascorbic acid content in different periods of seedling To Japonica rice (Taichung 39) and indica (Square 13) as the material, the determination of ascorbic acid content of seedlings at different stages. Ascorbic acid assay is a 2.6-dioxygen indophenol method. As can be seen from Table 1, ascorbic acid can not be measured in the seeds. After germination, as the germination process, the higher the content of ascorbic acid, because after germination, metabolism is strengthened, ascorbic acid synthesis of seedlings more, wheat and other crops also have the same result. Due to the phylogeny, the cold tolerance of japonica rice was greater than that of glaze rice, but the content of ascorbic acid in indica rice was higher than that of japonica rice. Thus, ascorbic acid content of rice varieties with high cold tolerance is not necessarily higher than that of rice varieties with weak cold tolerance.