Relation between the Leaf Color of Rice and the Stomatal Aperture Shown by the Infiltration Method with Special Reference to the Climatic Conditions

Japanese Journal of Crop Science

Yukindo TSUNO¹  Osamu OMOJI¹  Takeshi YAMAGUCHI¹  Kouichi KAI¹ 

关键词: Infiltration method;    気孔開度;    Leaf color;    浸潤試薬法;    Rice;    水稲;    Saturation deficit;    日変化;    Solar radiation;    日射強度;    Stomatal aperture;    飽差;    葉色;   

DOI  :  10.1626/jcs.60.475

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Rice plants (cv. Yamabiko) were cultivated in paddy field with different manure levels and were tested for variation in stomatal aperture by the infiltration method using a mixed solution of ethylene glycol and iso-butanol. The relationship between climatic condition and stomatal aperture for the top-expanded and second leaves during the period from booting to ripening was investigated in 1988. In 1989 the relationship between the daytime stomatal aperture and leaf color of the upper four leaves from booting to ripening under varying manure leaves was investigated. When solar radiation (W) was below 520 Wm-2, stomatal aperture (A) could be expressed by the following empirical equation : A=0.0108W (0.19c-0.40), where c is the index of greeness according to the FUJI leaf-color scale, which divides leaf color into seven stages from dark green to yellowish green. Under high solar radiation of above 520 Wm-2 at around noon, A was controlled by two factors, the saturation deficit (d) and leaf color. Therefore, the empirical equation is as follows : A=0.93c-0.18d. It was concluded that when the saturation deficit is low, greenish leaves are capable of maintaining a wider stomatal opening than yellowish green leaves. There was a higher correlation between leaf nitrogen concentration and the index of leaf greeness at the ripening stage than at the young panicle formation stage.

【 授权许可】

Unknown