Promoted by Institute of Plant Science and Resources, Okayama University
About Plant Stress

There are various kinds of stress imposed on plants. Most plants are firmly attached with roots in the ground and thus cannot move, so they cannot escape from stress so often present in their external environment. A study on the environmental response mechanisms of plants to stress is referred here as "plant stress research". 
In the PSS network, we broadly divide stress into  three main categories, "atmospheric or abiotic", "soil environment", and "other organisms or biotic". And in this framework, we also proceed with the network activities. Although roughly divided into three subnets, each part is not independent, but involves mutual interactions, same as we hope to occur among the PSS network members.

  • 光によるストレス・環境応答および光合成機能 
  • 高温や低温による植物の障害応答や耐性獲得とそれらに関わる分子機構、耐凍性など 
  • 大気中の酸素・二酸化炭素分圧、水分などの調節と生体内への影響 
  • 重力や光などへの屈性と植物の生長 

There are many stresses that plants receive at the above-ground level, apart from pests. For example, these types of stress are considered:

  • Environmental response to light, and photosynthesis research
  • Resistance of plants to high and low temperatures, molecular mechanisms of such resistance, and freezing tolerance 
  • Oxygen in the atmosphere · 
  • Carbon dioxide-related research 
  • Adjustment to pressure, moisture, etc. and their effects on plant body 
  • Plant growth responses to gravity, light direction, etc.
SOIL STRESS 土壌環境ストレス
  • 土壌養分の吸収に関する研究 
  • 酸性土壌などの不良環境に関するストレス応答と金属イオン耐性 
  • 根からの水分吸収、冠水ストレス応答 

Plant can receive a lot of stress underground... In this research category, we include following research themes: 

  • Absorption of nutrients from soil, mechanisms of uptake 
  • Stress responses to poor soil environment, such as acidic soils, low nutrient, etc. 
  • Mechanisms of water uptake by roots, aquaporin research 
  • Metal ion tolerance in roots 
  • Flooding stress responses, etc.

Here we include plant response mechanisms and resistance to pathogenic microorganisms, such as pathogenic bacteria,  viruses and funghi, and plant responses to insect pests and other competitors (plants, parasitic plants...). We use diverse approaches to understand multiple plant defense mechanisms to generate next genaration of pest resistant crops.

We also consider the effects of beneficial microorganisms on plants, such as growth promoting bacteria, methylotrophs and other commensal microorganisms on plants.