Abstract: Provided are isolated polynucleotides which comprise a nucleic acid sequence at least 80% identical to SEQ ID NO: 321, 1-320, 322-480, 793-2945 or 2946; isolated polypeptides which comprise an amino acid sequence at least 80% homologous to SEQ ID NO: 517, 481-516, 518-792, 2947-4662 or 4663, nucleic acid constructs comprising same, transgenic cells and plants expressing same and methods of using same for increasing yield, biomass, growth rate, vigor, oil content, fiber yield, fiber quality, abiotic stress tolerance, and/or nitrogen use efficiency of a plant.

Abstract: Provided are isolated polynucleotides which comprise a nucleic acid sequence at least 80% identical to SEQ ID NO: 3487, 1-239, 467-1973, 3481-3486, 3488-3674, 3738 or 3739; isolated polypeptides which comprise an amino acid sequence at least 80% homologous to SEQ ID NO: 246, 240-245, 247-465, 1974-3480, 3675-3736 or 3737, and methods of using same for increasing a yield, biomass, growth rate, vigor, oil content, fiber yield, fiber quality, abiotic stress tolerance, and/or nitrogen use efficiency of a plant.

Abstract: Provided are methods of increasing yield, biomass, growth rate, vigor, oil content, abiotic stress tolerance and/or nitrogen use efficiency of a plant by expressing within the plant an exogenous polynucleotide comprising a nucleic acid sequence at least 80% identical to SEQ ID NO: 905, 882, 1-12, 15-105, 203-297, 299-523, 845-881, 883-904, 906-925 or 933; or an exogenous polynucleotide encoding a polypeptide at least 80% identical to SEQ ID NO: 172, 146, 106-117, 120-145, 147-171, 173-202, 524-616, 621-844, 926-931 or 932. Also provided isolated polynucleotide comprising a nucleic acid sequence selected from the group consisting of SEQ ID NOs:905, 882, 1-13, 15-105, 203-523, 845-881, 883-904, 906-925 and 933, which can be used to increase yield, biomass, growth rate, vigor, oil content, abiotic stress tolerance and/or nitrogen use efficiency of a plant.

Abstract: Provided are methods of increasing nitrogen use efficiency, fertilizer use efficiency, yield, growth rate, vigor, biomass, oil content and/or abiotic stress tolerance of a plant by expressing within the plant an exogenous polynucleotide comprising a nucleic acid sequence at least 80% identical to SEQ ID NO: 2506, 2512, 2442, 2496, 2446, 1, 2, 4, 7, 8, 11, 12, 13, 16-19, 21-60, 63-128, 130-137, 270-287, 289-293, 295-306, 308-362, 364-666, 671, 673-1333, 2414-2441, 2443-2445, 2447-2455, 2458-2495, 2497-2505, 2507-2511, 2513-2521 or 2522; and of increasing nitrogen use efficiency, fertilizer use efficiency and/or oil content of a plant by expressing within the plant an exogenous polynucleotide comprising a nucleic acid sequence at least 80% identical to SEQ ID NO: 3, 5, 6, 9, 10, 14, 15, 288, 294, 2398-2412 or 2413.

Abstract: Provided are isolated polypeptides comprising the amino acid sequence at least 80% homologous to SEQ ID NO:68, 51-66, 69-100, 379-656, 707-715, 720-723, 742-754, 764-771 or 772 with the proviso that the amino acid sequence is not as set forth by SEQ ID NO: 765 or 771, isolated polynucleotides comprising the nucleic acid sequence at least 80% identical to SEQ ID NOs:18, 1-16, 19-50, 101-378, 657-672, 674-706, 716-719, 724-741 and 755-763 with the proviso that the nucleic acid sequence is not as set forth by SEQ ID NO:756 or 762, and isolated polynucleotides selected from the group consisting of SEQ ID NOs:779-792 and methods of using same for increasing oil content, yield, growth rate, biomass, vigor, abiotic stress tolerance and/or nitrogen use efficiency of a plant.

Abstract: Provided are methods of increasing tolerance of a plant to abiotic stress, and/or increasing biomass, growth rate, vigor and/or yield of a plant. The methods are effected by expressing within the plant an exogenous polynucleotide encoding a polypeptide comprising an amino acid sequence at least 90% homologous to the amino acid sequence selected from the group consisting of SEQ ID NOs:201, 207, 212, 202-206, 208-211, 213-391, 1655, 961-1529, and 1660-1663. Also provided are polynucleotides, nucleic acid constructs, polypeptides and transgenic plants expressing same which can be used to increase tolerance of a plant to abiotic stress, and/or increase biomass, growth rate, vigor and/or yield of a plant.

Abstract: Provided are method of increasing oil content, growth rate, biomass, yield and/or vigor of a plant. The methods are effected by upregulating in the plant an expression level of a polypeptide comprising an amino acid sequence at least 90% homologous to the amino acid sequence selected from the group consisting of SEQ ID NOs: 199, 166-198, 200-221, 229-307, 311-330, 351-353, 355-361, 363-364, 366-368, 218, 222-228, 308-310, 350, 354, 362, 365, 523-649, 786-920, 1047 and 1048. Also provided are polynucleotides, nucleic acid constructs, polypeptides and transgenic plants expressing same which can be used to increase oil content, growth rate, biomass, yield and/or vigor of a plant and produce oil.