Trait improvement in plants expressing myb-related proteins

Abstract

Polynucleotides and polypeptides incorporated into expression vectors are introduced into plants and were ectopically expressed. These polypeptides may confer at least one regulatory activity and increased photosynthetic resource use efficiency, increased yield, greater vigor, greater biomass as compared to a control plant.

What is claimed is: 
     
         1 . A transgenic plant having greater photosynthetic resource use efficiency than a control plant;
 wherein the transgenic plant comprises a recombinant polynucleotide comprising a promoter that regulates expression of a polypeptide comprising SEQ ID NO: 2 in a photosynthetic tissue to a level that is effective in conferring greater photosynthetic resource use efficiency in the transgenic plant relative to the control plant;   wherein the control plant does not comprise the recombinant polynucleotide;   wherein the promoter does not regulate protein expression in a constitutive manner; and   wherein expression of the polypeptide under the regulatory control of the promoter confers greater photosynthetic resource use efficiency in the transgenic plant relative to the control plant.   
     
     
         2 . The transgenic plant of  claim 1 , wherein the promoter is a photosynthetic tissue-enhanced promoter. 
     
     
         3 . The transgenic plant of  claim 2 , wherein the photosynthetic tissue-enhanced promoter is an RBCS3 promoter, an RBCS4 promoter, an At4g01060 promoter, an Os02g09720 promoter, an Os05g34510 promoter, an Os11g08230 promoter, an Os01g64390 promoter, an Os06g15760 promoter, an Os12g37560 promoter, an Os03g17420 promoter, an Os04g51000 promoter, an Os01g01960 promoter, an Os05g04990 promoter, an Os02g44970 promoter, an Os01g25530 promoter, an Os03g30650 promoter, an Os01g64910 promoter, an Os07g26810 promoter, an Os07g26820 promoter, an Os09g11220 promoter, an Os04g21800 promoter, an Os10g23840 promoter, an Os08g13850 promoter, an Os12g42980 promoter, an Os03g29280 promoter, an Os03g20650 promoter, or an Os06g43920 promoter (SEQ ID NO: 136-159, respectively). 
     
     
         4 . The transgenic plant of  claim 1 , wherein:
 the recombinant polynucleotide encodes the polypeptide comprising SEQ ID NO: 2; or   
       the polypeptide is encoded by a second polynucleotide and expression of the polypeptide is regulated by a trans-regulatory element. 
     
     
         5 . The transgenic plant of  claim 1 , wherein the transgenic plant has an altered trait that confers the greater photosynthetic resource use efficiency, wherein the altered trait is:
 (a) increased photosynthetic capacity; and/or   (b) increased photosynthetic rate; and/or   (c) a decrease in leaf chlorophyll content; and/or   (d) a decrease in percentage of nitrogen in leaf dry weight; and/or   (e) increased transpiration efficiency; and/or   (f) an increase in resistance to water vapor diffusion exerted by leaf stomata; and/or   (g) an increase in a rate of reactions responsible for dissipating light energy absorbed by light harvesting antennae as heat; and/or   (h) a decrease in the ratio of the carbon isotope  12 C to  13 C in above-ground biomass; and/or   (i) an increase in the total dry weight of above-ground plant material; and/or   (j) greater yield than the control plant.   
     
     
         6 . The transgenic plant of  claim 1 , wherein a plurality of the transgenic plants have greater cumulative canopy photosynthesis than the canopy photosynthesis of the same number of the control plants grown under the same conditions and at the same density. 
     
     
         7 . The transgenic plant of  claim 1 , wherein the transgenic plant is selected from the group consisting of a corn, wheat, rice,  Setaria, Miscanthus , switchgrass, ryegrass, sugarcane, miscane, barley, sorghum, soy, cotton, canola, rapeseed,  Crambe, Camelina , sugar beet, alfalfa, tomato,  Eucalyptus , poplar, willow, pine, birch and a woody plant. 
     
     
         8 . A method for increasing photosynthetic resource use efficiency in a plant, the method comprising:
 (a) providing one or more transgenic plants that comprise a recombinant polynucleotide that comprises a photosynthetic tissue-enhanced promoter that regulates a polypeptide comprising SEQ ID NO: 2; and   (b) growing the one or more transgenic plants;   wherein the photosynthetic tissue-enhanced promoter does not regulate protein expression in a constitutive manner; and   wherein expression of the polypeptide in the one or more transgenic plants confers increased photosynthetic resource use efficiency relative to a control plant that does not comprise the recombinant polynucleotide.   
     
     
         9 . The method of  claim 8 , wherein the photosynthetic tissue-enhanced promoter is an RBCS3 promoter, an RBCS4 promoter, an At4g01060 promoter, an Os02g09720 promoter, an Os05g34510 promoter, an Os11g08230 promoter, an Os01g64390 promoter, an Os06g15760 promoter, an Os12g37560 promoter, an Os03g17420 promoter, an Os04g51000 promoter, an Os01g01960 promoter, an Os05g04990 promoter, an Os02g44970 promoter, an Os01g25530 promoter, an Os03g30650 promoter, an Os01g64910 promoter, an Os07g26810 promoter, an Os07g26820 promoter, an Os09g11220 promoter, an Os04g21800 promoter, an Os10g23840 promoter, an Os08g13850 promoter, an Os12g42980 promoter, an Os03g29280 promoter, an Os03g20650 promoter, or an Os06g43920 promoter (SEQ ID NO: 136-159, respectively). 
     
     
         10 . The method of  claim 8 , wherein an expression cassette comprising the recombinant polynucleotide is introduced into a target plant to produce the transgenic plant. 
     
     
         11 . The method of  claim 8 , wherein the transgenic plant has an altered trait that confers the greater photosynthetic resource use efficiency, wherein the altered trait is:
 (a) increased photosynthetic capacity; and/or   (b) increased photosynthetic rate; and/or   (c) a decrease in leaf chlorophyll content; and/or   (d) a decrease in percentage of nitrogen in leaf dry weight; and/or   (e) increased transpiration efficiency; and/or   (f) an increase in resistance to water vapor diffusion exerted by leaf stomata; and/or   (g) an increase in a rate of reactions responsible for dissipating light energy absorbed by light harvesting antennae as heat; and/or   (h) a decrease in the ratio of the carbon isotope  12 C to  13 C in above-ground biomass; and/or   (i) an increase in the total dry weight of above-ground plant material; and/or   (j) greater yield than the control plant.   
     
     
         12 . The method of  claim 8 , wherein the transgenic plant is selected for having the increased photosynthetic resource use efficiency relative to the control plant. 
     
     
         13 . The method of  claim 12 , wherein the plant is selected for having the greater yield relative to the control plant. 
     
     
         14 . The method of  claim 8 , wherein a plurality of the transgenic plants have greater cumulative canopy photosynthesis than the canopy photosynthesis of the same number of the control plants grown under the same conditions and at the same density. 
     
     
         15 . The method of  claim 8 , the method steps further including:
 crossing the target plant with itself, a second plant from the same line as the target plant, a non-transgenic plant, a wild-type plant, or a transgenic plant from a different line of plants, to produce a transgenic seed.   
     
     
         16 . A method for producing and selecting a crop plant with greater yield than a control plant, the method comprising:
 (a) providing one or more transgenic plants that comprise a recombinant polynucleotide that comprises photosynthetic tissue-enhanced promoter that regulates a polypeptide comprising SEQ ID NO: 2, wherein the photosynthetic tissue-enhanced promoter does not regulate protein expression in a constitutive manner;   (b) growing a plurality of the transgenic plants; and   (c) selecting a transgenic plant that:
 has greater photosynthetic resource use efficiency than the control plant, wherein the control plant does not comprise the recombinant polynucleotide; and/or 
 comprises the recombinant polynucleotide; 
 wherein expression of the polypeptide in the selected transgenic plant confers the greater yield of the selected transgenic plant relative to the control plant. 
   
     
     
         17 . The method of  claim 16 , the method steps further including:
 (d) crossing the selected transgenic plant with itself, a second plant from the same line as the selected transgenic plant, a non-transgenic plant, a wild-type plant, or a transgenic plant from a different line of plants, to produce a transgenic seed.   
     
     
         18 . The method of  claim 16 , wherein the transgenic plant is selected for having the increased photosynthetic resource use efficiency relative to the control plant. 
     
     
         19 . The method of  claim 16 , wherein a plurality of the selected transgenic plants have greater cumulative canopy photosynthesis than the canopy photosynthesis of the same number of the control plants grown under the same conditions and at the same density. 
     
     
         20 . The method of  claim 16 , wherein the selected transgenic plant has an altered trait that confers the greater photosynthetic resource use efficiency, wherein the altered trait is:
 (a) increased photosynthetic capacity; and/or   (b) increased photosynthetic rate; and/or   (c) a decrease in leaf chlorophyll content; and/or   (d) a decrease in percentage of nitrogen in leaf dry weight; and/or   (e) increased transpiration efficiency; and/or   (f) an increase in resistance to water vapor diffusion exerted by leaf stomata; and/or   (g) an increase in a rate of reactions responsible for dissipating light energy absorbed by light harvesting antennae as heat; and/or   (h) a decrease in the ratio of the carbon isotope  12 C to  13 C in above-ground biomass; and/or   (i) an increase in the total dry weight of above-ground plant material.