It has been shown recently that treatment with gibberellic acid (GA) results in an increase in diffusible auxin in the pea (7), sunflower (7) and Centaurea (8). Treatment with GA also increases the amount of extractable auxin in peas (14), the potato tuber (18), Rhus typhina (13) and Trifoliuws ochroleucunm (15). Further it has been (lenmonstrated that in the dwarf pea and Cenitauirea the incre...

Plastic film mulching often increases the yield of winter wheat in Loess Plateau China, but physiological mechanisms are unclear, especially response to interaction between mulch and water supply. In this study, we investigated interactive effects initial soil (dry, moderate, wet), cover (plastic mulch, bare soil), seasonal conditions on dynamics dry matter partitioning, water-soluble carbohydr...

Opportunities exist for replacing reduced height (Rht) genes Rht-B1b and Rht-D1b with alternative dwarfing genes, such as the gibberellin-responsive gene Rht12, for bread wheat improvement. However, a comprehensive understanding of the effects and mode of action of Rht12 is lacking. In the present study, the effects of Rht12 were characterized by analyzing its effects on seeding vigour, seedlin...

The concentration of free indoleacetic acid (IAA) is high in cotton (Gossypium hirsutum L.) fruiting forms before anthesis, but is low at and for a few days after anthesis. Amide-linked and ester IAA were measured in fruiting forms at 9, 6, and 3 days before anthesis; at anthesis; and at 2, 4, 7, and 9 days after anthesis to determine if free IAA decreased because it was converted to a conjugat...

The present study was conducted in order to investigate the effect of salicylic acid on growth, yield and macro-elements absorption of fennel in split-plot as base on randomized complete block design (RCBD) with three replications in Tehran, Iran. Irrigation regime as main plot was undergone in 5 levels that included: I1: full irrigation, I2: cut off irrigation at stem elo...

in order to evaluate the effect of nitrogen rates and green manure crops on dry matter mobilization and mobilization efficiency indices of wheat (triticum aestivum l.) a field experiment was conducted in agricultural faculty of shahid chamran university, ahvaz during growing season of 2010-2011. the experimental design was split-plot based on randomized complete block with three replications. m...

The physiological basis of thermoperiodic stem elongation is as yet poorly understood. Thermoperiodic control of gibberellin (GA) metabolism has been suggested as an underlying mechanism. We have investigated the influence of different day and night temperature combinations on GA levels, and diurnal steady-state expression of genes involved in GA biosynthesis (LS, LH, NA, PSGA20ox1, and PsGA3ox...

the sunn pest, eurygaster integriceps puton, is a serious pest of wheat in coraim region of ardabil province. in this study, the egg parasitoids of sunn pest was collected and identified in this region during 2007 and 2008. also, the percentage of egg parasitism was determined in 14 different defined areas in this region. the areas 1-3 were selected in irrigated wheat fields in the presence of ...

In order to explore the effect of relationship between combination sowing date and nitrogen application rate on status rice plants uptake transfer after anthesis, three dates were set—23 May (S1), 2 June (S2), 12 (S3)—and four fertilizer treatments—no (N0), 180 (N1), 270 (N2), 360 (N3) kg N/hm2—were applied in a field experiment. The dynamic characteristics post-anthesis under different treatme...

Stem reserves in grain crops are considered important filling under post-anthesis stress the absence/low availability of photosynthetic assimilates. Considerable variation is present among genotypes for stem reserve translocation wheat. Therefore, this study aimed to exploit phenotypic wheat control and chemically induced conditions. The six parents their corresponding direct cross combinations...