Winter Klaus, Königer Martina
Lehrstuhl für Botanik II der Universität, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Federal Republic of Germany.
Oecologia. 1991 Jul;87(2):190-197. doi: 10.1007/BF00325256.
Gossypium hirsutum L. var. Delta Pine 61 was cultivated in controlled-environment chambers at 1000-1100 μmol photosynthetically active photons m s (medium photon flux density) and at 1800-2000 μmol photons m s (high photon flux density), respectively. Air temperatures ranged from 20° to 34°C during 12-h light periods, whereas during dark periods temperature was 25° C in all experiments. As the leaf temperature decreased from about 33° to 27° C, marked reductions in dry matter production, leaf chlorophyll content and photosynthetic capacity occurred in plants growing under high light conditions, to values far below those in plants growing at 27° C and medium photon flux densities. The results show that slightly suboptimum temperatures, well above the so-called chilling range (0-12° C), greatly reduce dry matter production in cotton when combined with high photon flux densities equivalent to full sunlight.
陆地棉品种岱字棉61分别在可控环境培养箱中，于光合有效光子通量为1000 - 1100 μmol·m⁻²·s⁻¹（中等光子通量密度）和1800 - 2000 μmol·m⁻²·s⁻¹（高光子通量密度）条件下种植。在12小时光照期间，气温范围为20°C至34°C，而在所有实验的黑暗期间温度均为25°C。随着叶片温度从约33°C降至27°C，在高光条件下生长的植株中，干物质产量、叶片叶绿素含量和光合能力显著降低，降至远低于在27°C和中等光子通量密度下生长的植株的值。结果表明，略低于最适温度（远高于所谓的冷害范围0 - 12°C），当与相当于全日照的高光子通量密度相结合时，会极大地降低棉花的干物质产量。
