Temperature effects on cotton canopy growth, photosynthesis, and respiration

The ecological range of temperature conditions where cotton (Gossypium hirsutum L.) is commercially grown frequently exceeds the temperature range of available data. To predict growth, development, and responses of the primary physiological processes to those conditions, data at both lower and higher temperatures are needed. Cotton plants were grown in naturally lit, temperature- and CO 2 -controlled chambers. Plants grown at near-optimum temperatures (30 and 35 o C day temperature) fixed twice as much CO 2 at high photosynthetically active radiation during the fruiting period as did plants growing at 20 o C (...)