Analysis of calcium tolerance response system in some dicotyledous plants

我们需要建立技术，在各种营养不良的条件下种植高生产力的植物，以养活预计在下个世纪的大量人口。因此，我们正在尝试在各种营养胁迫下生长良好的植物的分子育种。在本次调查中，我试图通过分子生物学技术获得耐钙胁迫的植物。将7科9种作物在含钙过量的营养液中生长30 d。钙过量对各作物干重的影响有很大差异。过量钙对小松、黄瓜和菠菜干重的影响很小或没有影响，对茄子和卢平的影响为15 - 25%，对胡萝卜和番茄的影响为33 - 43%。在干旱气候下生长的艾草Altemisia capillaris，在5%、10%、15%和20%的湿度条件下，在受控环境条件下生长7天。在5%的土壤水分条件下，毛茛发芽，根系伸长。另一方面，在含氢氧化钙6%的沙质土壤和正常条件下，在可控环境条件下培养毛蒿70 d。茎部钙浓度比对照提高了2.5倍。

We are required establish technologies to grow higher plants of high productivity under various mal nutrient conditions to feed the large population expected in the next century.Thus, we are trying molecular breeding of plants which grow well under various nutrient stresses. In this investigation, I am trying to obtain the plants witch are tolerant to Ca excess stress by molecular biological techniques.Nine crop species from seven families were grown in the nutrient solutions of containing Ca excess for 30 days. The effect of Ca excess on dry weight was very different with each crop. Decreases in dry weight as a result of Ca excess were little or none in komatsuna, cucumber and spinach, 15 - 25% in eggplant and lupin, and 33 - 43% in carrot and tomato.Altemisia capillaris (a kind of mugwort, this plant is grown in the arid climate.) were grown under controlled environment condition for 7 days in quarts sand of 5%, 10%, 15% and 20% moisture conditions. Altemisia capillaris would be germinated 5% soil moisture and its root were elongated existence depth of moisture. On the other hand, Artemisia capillaris were grown under controlled environment condition for 70 days in sandy soil containing calcium hydroxide 6% and normal condition. Moreover, the Ca concentration of its shoot was increased 2.5 times with compared control.