Use of substituted isoquinolinones, isoquinolindiones, isoquinolintriones and dihydroisoquinolinones or in each case salts thereof as active agents against abiotic stress in plants

A method of treatment for a plant comprising applying to a plant an effective nontoxic amount of at least one compound of formula (I) and/or a respective salt thereof

• where
• Q represents
• where the arrow represents a bond to the group N—R5,
• W represents oxygen or sulphur,
• R1, R2, and R3 independently of one another represent hydrogen, nitro, amino, hydroxyl, halogen, cyano, alkyl, cycloalkyl, alkenyl, alkynyl, optionally halogen-, alkyl-, alkoxy-, or haloalkyl-substituted phenyl, arylalkyl, heteroaryl, cycloalkylalkyl, haloalkyl, alkoxyalkyl, alkoxy, haloalkoxy, cycloalkyloxy, arylalkoxy, alkoxycarbonyl, alkylthio, haloalkylthio, aryloxy, or aminoalkyl,
• R4 represents hydrogen, nitro, amino, hydroxyl, halogen, cyano, alkyl, cycloalkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, haloalkyl, alkoxyalkyl, alkoxy, haloalkoxy, cycloalkyloxy, arylalkoxy, alkoxycarbonyl, alkylthio, haloalkylthio, heterocyclyl-N-alkoxy, aryloxy, or aminoalkyl,
• R5 represents hydrogen, hydroxyl, alkyl, cycloalkyl, halogen, haloalkyl, alkoxyalkyl, alkynyl, alkenyl, cycloalkylalkyl, cyanoalkyl, arylalkyl, heteroarylalkyl, aryl, alkylcarbonyl, cycloalkylcarbonyl, haloalkylcarbonyl, alkoxycarbonyl, alkylsulphonyl, arylsulphonyl, or a negative charge,
• R6 represents hydrogen, hydroxyl, halogen, amino, alkyl, cycloalkyl, alkylcarbonyl, arylcarbonyl, alkylaminocarbonyl, bisalkylaminocarbonyl, cycloalkylaminocarbonyl, arylaminocarbonyl, cyanoalkylaminocarbonyl, hydroxycarbonyl, alkoxycarbonyl, cycloalkyloxycarbonyl, cycloalkylalkoxycarbonyl, haloalkoxycarbonyl, arylaminocarbonylamino, alkylaminocarbonylamino, heteroarylaminocarbonylamino, alkoxy, alkylcarbonyloxy, arylcarbonyloxy, haloalkyl, alkoxyalkyl, alkynyl, alkenyl, aryl, heteroaryl, heterocyclyl, alkylamino, bisalkylamino, cycloalkylamino, or arylalkylamino, and
• R7 represents hydrogen, halogen, amino, alkyl, haloalkyl, cycloalkyl, alkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, cycloalkylcarbonyl, alkoxycarbonyl, hydroxycarbonyl, cycloalkylalkoxycarbonyl, alkylcarbonyloxy, arylaminocarbonyl, alkylaminocarbonyl, bisalkylaminocarbonyl, cycloalkylaminocarbonyl, cyanoalkylaminocarbonyl, alkylamino, arylamino, cycloalkylamino, or bisalkylamino,
• to increase resistance of the plant to at least one abiotic stress factor.

A substituted isoquinolinone of formula (I) and/or a respective salt thereof

• where
• Q represents
• W represents oxygen,
• R1 and R3 are each independently hydrogen, halogen, cyano, (C1-C7)-alkyl, optionally substituted phenyl, (C1-C7)-alkoxy, (C1-C7)-haloalkoxy,
• R2 represents phenyl optionally substituted with one or two halogen, (C1-C8)-alkyl, (C1-C8)-alkoxy, or (C1-C7)-haloalkyl,
• R4 represents hydrogen, halogen, cyano, or (C1-C8)-haloalkoxy,
• R5 represents hydrogen, (C1-C7)-alkyl, or a negative charge,
• R6 represents hydrogen, hydroxy, (C1-C7)-alkyl, (C1-C7)-alkylaminocarbonyl, (C1-C7)-alkoxycarbonyl, (C1-C7)-cycloalkoxycarbonyl, (C1-C7)-alkoxy, or optionally substituted phenyl, and
• R7 represents hydrogen, (C1-C7)-alkyl, (C1-C7)-alkylcarbonyl, or (C3-C7)-cycloalkylcarbonyl.