New PDF release: Salicylic Acid - A Plant Hormone

By S. Hayat (Editor), A. Ahmad (Editor)

Phytohormones are heavily excited by directing plant development, coordinating with the metabolism that offers strength and the development blocks to enhance the shape that we realize as plant. This booklet offers info on Salicylic Acid, a chemical that has major influence on flowers, and will be raised to the prestige of the phytohormones due to its major effect on a number of points of the vegetation.

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Sample text

In some experiments, a decrease in not only diffusive but also in the electrogenic component was observed (Keppler and Novacky, 1986). , 1986). The electrogenic component comprising of a great part of the membrane potential of plant cells is mainly created by the ɇ+-pump. Significance of ɇ+-ATPase activity in plant defense responses was demonstrated in experiments with the agents affecting this activity. Thus, a fungal toxin fusicoccin and a plant hormone auxin activated ɇ+-ATPase and simultaneously induced plasma membrane hyperpolarization.

Effect of salicylic acid on the growth of Saintpaulia ionantha (violet) Values are the mean of 20 replicate samples per treatment, r standard error. 05, Tukey’s In a series of experiments run with Tagetes erecta cultivated in open conditions, it was found that beside the floral characters, the biomass of the shoot was significantly affected by the application of low concentration of SA (Sandoval-Yepiz, 2004; Figure 3). 0 a 44 B a Shoot fresh weigth (g) 40 36 b 32 28 c 24 20 16 0 a 27 Height (cm) 24 a A b c 21 18 15 12 0 Control 10 -10 10 -8 10 -6 Salicylic acid treatment [M] Figure 3.

However, SA protonophore properties may be one more way to reduce transmembrane electrical gradients. In spite of important role of pH in pathogenesis, many of the SA effects are not related to ɪHi changes. , 2002). This means that, along with an unspecific decrease in the intracellular pH, SA also induces specific defense responses in plants. Along with potassium and proton, calcium plays an important role in signal transduction. , 1999; Scott and Allen, 1999). Ca2+ content increases in response to diverse cell treatments.

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