Composition of dehydrated forages /

Caption title.

Development of field research equipment and evaluation of methods of establishing forage crops /

Caption title.

Response of cotton to 2,4-D and related phenoxy herbicides /

Caption title.

Tolerance of certain crops to several aquatic herbicides in irrigation water /

Caption title.

Bioassay of clover wound tumor virus and the mycoplasmalike organisms of peach Western X and aster yellows /

Literature cited: p. 28-32.

Response of several crops to six herbicides in irrigation water /

Cover title.

Review of forage losses caused by rangeland grasshoppers /

Cover title.

Association of plant hairs and insect resistance : an annotated bibliography /

"September 1975."

Control of water pollution from cropland.

Issued jointly with the Office of Research and Development, EPA.

"Centralization of power supply";

Mode of access: Internet.

Proceedings of the Fifth Ocean Thermal Energy Conversion Conference, February 20-22, 1978, Miami Beach, Florida /

Mode of access: Internet.

Flora of southeastern Washington and of adjacent Idaho,

Mode of access: Internet.

Flora of New Bedford and the shores of Buzzard's Bay, with a procession of the flowers /

Includes index.

Effects of 6-benzylaminopurine treatments on the longevity of harvested Grevillea 'Sylvia' inflorescences

Exogenous treatments with cytokinins, such as 6-benzylaminopurine (BA), can delay senescence of some plant tissues. Grevillea 'Sylvia' inflorescences have a short vase life. BA supplied in vase solutions at up to 0.1 mM did not delay senescence of G. 'Sylvia' in florescences. However, BA applied by dipping at concentrations up to 10 mM extended their vase life (longevity). Senescence parameters of relative fresh weight, flower abscission, flower opening, flower discolouration and flower wilting were all suppressed by BA dips. Dip treatment with BA (1 mM) was effective on G. 'Sylvia' in florescences at three different maturity stages.

Effects of vase solution pH and abscisic acid on the longevity of cut 'Baccara' roses

Abscisic acid (ABA) supplied in the vase solution can induce stomatal closure in the leaves of cut flowers, including roses (Rosa hybrida L.). This effect may be beneficial in reducing water deficit stress. Extracellular pH can affect active ABA concentrations in the apoplast of guard cells, with sap alkalisation enhancing the physiological activity of ABA. Accordingly, it was hypothesized that vase solution pH may affect ABA-mediated stomatal closure of cut roses. Two experiments were conducted to study the interaction of vase solution pH and ABA. In the first, cut 'Baccara' roses were held in vase solutions with +/- 10(-5) M ABA at pH 6, pH 7 and pH 8. In the second experiment, roses were held with +/- 10(-5) M ABA at pH 6 and pH 8 in the presence and absence of 1 mg l(-1) AgNO3 as a bactericide. Supply of ABA increased vase life and reduced vase solution usage of flowers held in low pH 6 solutions, indicating induction of stomatal closure. Conversely, ABA supplied at pH 8 was associated with reduced vase life. This negative result was associated with enhanced development of vase solution microbes at high pH, which overrode any potential pH-mediated ABA efficacy effects.