The isopentenyltransferase gene (IPT) that encodes a rate limiting enzyme in cytokinin biosynthesis, under the control of a water-deficit responsive and maturation specific promoter PSARK was introduced into cotton and the performance of the PSARK::IPT transgenic cotton plants was analyzed in the greenhouse and growth chamber conditions. 

The data indicate that PSARK::IPT-transgenic cotton plants displayed delayed senescence under water deficit conditions in the greenhouse. 

TLS Online TPP Program

#Id: 4972

#Unit 6. System Physiology – Plant

Examples of phenomena involved in this High Irradiance Response (HIR) include: 

• anthocyanin synthesis in seedlings and apple skins

• inhibition of hypocotyl elongation in mustard, lettuce and petunia

• plume hook opening in lettuce

• cotyledon enlargement in lettuce

• ethylene production in sorghum

TLS Online TPP Program

#Id: 4974

#Unit 6. System Physiology – Plant

LFR action spectra for the photoreversible stimulation and inhibition of seed germination in Arabidopsis.

TLS Online TPP Program

#Id: 4976

#Unit 6. System Physiology – Plant

Plant photomorphogenic responses induced by high irradiances,

TLS Online TPP Program

#Id: 4978

#Unit 6. System Physiology – Plant

Comparison between the very-low-fluence (VLFR), low-fluence (LFR), and high-irradiance responses (HIR)

TLS Online TPP Program

#Id: 4982

#Unit 6. System Physiology – Plant

HIR action spectrum for the inhibition of hypocotyl elongation of dark-grown lettuce seedlings. The peaks of activity for the inhibition of hypocotyl elongation occur in the UV-A, blue, and far-red regions of the spectrum.

TLS Online TPP Program

#Id: 4983

#Unit 6. System Physiology – Plant

Role of phytochrome in shade perception in sun plants versus shade plants.