Use of jaz5a for improving drought-resistance in a plant

Abstract

The present invention provides use of a plant gene JAZ5a for improving drought-resistance of a plant. It further provides a method for improving the drought-resistance of a plant, comprising enhancing the expression or activity of Jaz5A in said plant.

1 . A method for selecting a plant with improved drought resistance, comprising:
 introducing into a plurality of plants or enhancing expression or activity in the plants of a polynucleotide encoding a drought resistance protein of plant origin having the amino acid sequence of SEQ ID NO:4 or at least 95% sequence identity to the amino acid sequence of SEQ ID NO:4, and   measuring drought resistance of the plants to select a plant with improved drought resistance.   
     
     
         2 . The method according to  claim 1 , wherein the plant is not  Arabidopsis thaliana.    
     
     
         3 . The method according to  claim 1 , wherein the step of introducing into the plant or enhancing expression or activity in the plant of the drought-resistance protein comprises transforming said plant with a polynucleotide encoding the drought-resistance protein. 
     
     
         4 . The method according to  claim 3 , wherein the polynucleotide is incorporated into the genome of the plant. 
     
     
         5 . The method according to  claim 3 , comprising:
 (1) providing an  Agrobacterium  strain containing an expression vector comprising a polynucleotide encoding the drought-resistance protein;   (2) providing a plant cell, organ or tissue;   (3) contacting the plant cell, organ or tissue of step (2) with the  Agrobacterium  strain of step (1) such that the polynucleotide encoding the drought-resistance protein is introduced into the plant cell, organ or tissue;   (4) optionally, selecting a plant cell;   (5) growing the plant cell, organ or tissue into a plant.   
     
     
         6 . The method according to  claim 5 , wherein after introduction of the polynucleotide in the plant cell, organ or tissue, the polynucleotide integrates in the genome of the plant cell, organ or tissue. 
     
     
         7 . The method according to  claim 1 , wherein the plant is selected from the group consisting of dicotyledon, monocotyledon and gymnosperm. 
     
     
         8 . The method according to  claim 1 , wherein the plant is selected from the group consisting of wheat, barley, rye, rice, corn, sorghum, beet, apple, pear, plum, peach, apricot, cherry, strawberry,  Rubus swinhoei  Hance, blackberry, bean, lentil, pea, soy, rape, mustard, opium poppy, olea europea, helianthus, coconut, plant producing castor oil, cacao, peanut, calabash, cucumber, watermelon, cotton, flax, cannabis, jute, citrus, lemon, grapefruit, spinach, lettuce, asparagus, cabbage,  Brassica campestris  L. ssp.  Pekinensis, Brassica campestris L . ssp. chinensis, carrot, onion, murphy, tomato, green pepper, avocado, cassia, camphor, tobacco, nut, coffee, aubergine, sugar cane, tea, pepper, grapevine, nettle grass, banana, natural rubber tree and ornamental plant. 
     
     
         9 . The method according to  claim 1 , wherein the drought-resistance protein has the amino acid sequence of SEQ ID NO:4. 
     
     
         10 . The method according to  claim 1 , wherein the drought-resistance protein has at least 95% sequence identity to the amino acid sequence of SEQ ID NO:4.