Ryan Whitford

Compositions and methods are provided for genome modification of a nucleotide sequence located in or near a male fertility gene of Ms1 or Ms5 in the genome of a plant cell or plant to produce a male-sterile plant. In some examples, the methods and compositions employ a guide RNA/Cas endonuclease system for modifying or altering target sites located in or near a male fertility gene of Ms1 or Ms5 in the genome of a plant cell, plant or seed to produce a male-sterile plant. Also provided are compositions and methods employing a guide polynucleotide/Cas endonuclease system for genome modification a nucleotide sequence located in or near a male fertility gene of Ms1 or Ms5 in the genome of a plant cell to produce a male-sterile plant. Compositions and methods are also provided for restoring fertility to a Ms1 or Ms5 nucleotide sequence to a male-sterile Ms1 or Ms5 plant.

Compositions and methods are capable of modulating male fertility in a plant. Compositions comprise polynucleotides and polypeptides, and fragments and variants thereof, which modulate male fertility. Expression cassettes comprise a male-fertility polynucleotide, or fragment or variant thereof, operably linked to a promoter, wherein expression of the polynucleotide modulates the male fertility of a plant. Regulatory sequences drive expression in a male-tissue-preferred manner and may be targets to downregulate an operably-linked gene. Mutations that induce nuclear recessive male sterility in subsequent selfing and crossing of wheat lines containing the mutations may be tracked. Male-sterile plants may be maintained by crossing with a maintainer plant. Hybrids can be produced using the male-sterile plants.

Ferrochelatase expression results in improved agronomic performance including various photosynthetic characteristics and drought tolerance. Methods and compositions that affect yield and other agronomic characteristics in plants are disclosed.
L'expression de la ferrochélatase entraîne de meilleures performances agronomiques, notamment diverses caractéristiques de photosynthèse et la tolérance à la sécheresse. L'invention concerne des procédés et des compositions qui ont une influence sur le rendement et d'autres caractéristiques agronomiques de plantes.

The present invention relates to the use of a compound for plant growth regulation, preferably by application of the compound to plants, to the seeds from which they grow or to the locus in which they grow, in an effective plant growth regulating, preferably non-phytotoxic amount, which compound is an indolinone derivative of formula (I) or an agriculturally acceptable salt thereof: wherein: X is NNHR2, NNHC(-S)NH-(C1-C6)alkyl or a formula (A): in which the point of attachment is the carbon atom marked 2, and a method for treatment of plants with such compounds in order to induce growth regulating responses.

The present invention relates to the use of a compound for plant growth regulation, preferably by application of the compound to plants, to the seeds from which they grow or to the locus in which they grow, in an effective plant growth regulating, preferably non-phytotoxic amount, which compound is a 3,4-disubstituted maleimide derivative of formula (I) or an agriculturally acceptable salt thereof, wherein: X is aryl or heteroaryl which groups are unsubstituted or substituted; Y is NH or a covalent bond; and Z is aryl or heteroaryl which groups are unsubstituted or substituted and a method for treatment of plants with such compounds in order to induce growth regulating responses.

The present invention relates to a new class of plant growth regulators. In particular, the invention relates to fused azepinone derivative of general formula (I) or an agriculturally acceptable salt thereof wherein X is CO2R2 or H; Y is OH; NHNR3R4, NHNHC(=Z)NR5R6 or NHNHC(=Z)CR7R8R9; or X and Y together with the two carbon atoms to which they are attached form a ring of formula (A) and a method for treatment of plants with such compounds in order to induce growth regulating responses.