摘要
从玉米各层根中的一条吸入染料溶液后追索其输往地上各器官的踪迹。从 n 层节根可输往叶片范围为≥n 节可见叶。主胚根输往各叶全部纵向大脉,次生胚根每条只输往各叶的50%纵向大脉,各层节根从不同方向输入后,各自通向相应叶片的特定部位。在茎内,每一条节根吸水后,一般在输入方向的一个局部内上升,输入节位愈高,上升途径愈靠茎的边缘。在籽粒灌浆期,6—7层节根吸入的染料,可在雄穗和雌穗中,包括苞叶、果穗柄、穗轴和籽粒中观察到。从不同方向的根输入时,在繁殖器官中分布方式也不同。
This study concerns the pathways of water movement from each root of Zea mays L.to the stems leaves and reproductive organs.These pathways were followed by using dyesolution absorbed by individual root.Observation showed,solution absorbed by each nth level adventitious root of Zeamays could move up to the nth or more than nth visible leaves(counted from the base ofstems).The result indicated that the course of the first seminal root were connectedto whole longitudinal veins of leaves of seedling,whereas dye from each lateral seminalroot could only move to about 50% longitudinal veins of the stained leaves.There is acorresponding relationship between the location of the stained veins in the leaves with theorientation of the absorbing root.The higher the position of the absorbing root,the more distant is the stained areafrom the center of the cross section of the stem.At grain filling stage,dye solution absorbed by 6—7th adventitious root could beobserved in tassals and ears,including husks,stalks and grains.The stained area of eachorgans were also related to the orientation of the absorbing root.
出处
《作物学报》
CAS
CSCD
北大核心
1989年第4期289-296,共8页
Acta Agronomica Sinica
关键词
玉米
水分通路
胚根
Zea mays L.
Water Pathways
First seminal root
Lateral seminal root
Adventitious root
Longitudinal vein
Transverse vein
