|Budget Amount *help
¥2,300,000 (Direct Cost : ¥2,300,000)
Fiscal Year 1995 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 1994 : ¥1,700,000 (Direct Cost : ¥1,700,000)
There has been almost no study made in which communication between each organ of a plant or between plants in a group was discussed from a view point of interrelationship. In order to investigate this problem, the process of BA fomation was researched by investigating whether synchronization phenomenon exists between individuals in environmental response and in morphogenesis or not. According to the plans and methods of this study which were reported in application form, the obtained results are following next 5 points.
1. By making a long-term measurement of bio-electric potential changes (AC signals) of kapok leaves in a group, some leaves in seceded place showed same wave patterns. This phenomenon also happens when some leaves were excised. This shows that bio-electric potential changes in chaos. Furthermore, the correlation coefficient abates to about 2.5 when sound stimulation was given.
2. By using a system which can make a long-term measurement of bio-electric potential (DC signal
s) changes, I have found that trees showing similar wave patterns form groups.
3.A new measurement system which can measure patterns of changes on electric field self-organized around a root was developed. By this system, I investigated whether feeble electric field around a root changes or not by stimulating a stem or a leave with light, gavity, or obstacle. From experiments, we have found that electric field patterns are collapsed and re-organized in all cases. This suggests that electric field works as the autonomous interface between root and external environment, and roots create informations which were adjusted to environments on ground.
4. By a system which can make a long-term measurement of motions of plant organs (leaves, roots, petals, and etc.), I have simultaneously measured rhythmic motions of a leaf and a root. I have found out that both root and leaf showed cooperative motions with period of about 2 [h]. Additionally, when two plants were placed adjacent to each other, both roots grew rhythmically with phase difference to not to collide int each other.
5. Based on obtained results, I examined the communication of plants in emergence of BA,and I have indicated some knowledge on drafting informational BA. Less