Agent for improving plant growth and method for producing plant using same

Abstract

This disclosure provides an agent for improving plant growth, the agent significantly improving resistances to a wide variety of stress possibly subjected to a plant, such as resistances to chemical stress and ultraviolet ray stress as well as resistances to temperature stress and dry stress, the agent having a high safety. This agent for improving plant growth alleviates an environmental stress on a plant, promotes plant growth, or a plant quality. This agent for improving plant growth contains, as its main ingredient, zerumbone, an analog of zerumbone, or a salt of zerumbone or the analog. Furthermore, in this agent for improving plant growth, the analog of zerumbone is α-humulene or β-caryophyllene.

1 - 5 . (canceled) 
     
     
         6 . An agent for alleviating stress on a plant and improving plant growth which promotes plant growth by alleviating an environmental stress on a plant, the agent comprising zerumbone as the main ingredient. 
     
     
         7 . The agent for alleviating stress on a plant and improving plant growth according to  claim 6 , wherein the environmental stress is at least one of high temperature stress, low sunshine stress, acid stress, alkaline stress, dry stress, ultraviolet ray stress, and salt stress. 
     
     
         8 . The agent for alleviating stress on a plant and improving plant growth according to  claim 6 , wherein the agent is an extract or a pulverized product of wild ginger. 
     
     
         9 . The agent for alleviating stress on a plant and improving plant growth according to  claim 7 , wherein the agent is an extract or a pulverized product of wild ginger.