This study aimed to assess the effects of temperature on growth and photosynthetic performance of hybrid Napier grass (a C₄ plant) as compared to giant reed (a C₃ plant). The plants were grown under 20/16 °C, 28/24 °C and 36/32 °C day/night temperature, respectively, in walk-in growth cabinets. The optimum temperature for plant growth and photosynthesis of hybrid Napier grass was 28/24 °C. At higher or lower temperature, the plants had lower growth rates, dry mass production, and net CO₂ assimilation rates. Moreover, at 20/16 °C anthocyanin was formed in the epidermal cells of stems and young leaves probably as a defence strategy of the plants to prevent photo-inhibition damage. Giant reed performed optimal at 28/24 °C and 36/32 °C, but growth rates, dry mass production and net CO₂ assimilation rates decreased at the lower temperatures. At the lowest temperature, giant reed had significantly higher contents of chlorophyll in the leaves and lower light compensation points than at the higher temperature. These cold acclimation responses enhance the photosynthetic performance of giant reed at low temperatures, which is an advantage for growth in cold climates, particularly at low light intensities. The results show that the C₄ hybrid Napier grass has a low plasticity in relation to growth temperature and, surprisingly, has reduced growth at high ambient temperatures, whereas the C₃ giant reed is more plastic and has a high acclimation potential and grows best at high temperatures.

这项研究旨在评估温度对杂种纳皮草（C ₄植物）与巨型芦苇（C ₃植物）的生长和光合性能的影响。这些植物分别在步入式生长柜中的20/16°C，28/24°C和36/32°C白天/夜晚温度下生长。杂交内皮草的植物生长和光合作用的最佳温度为28/24°C。在较高或较低的温度下，植物的生长速率，干量产量和净CO _2均较低。同化率。此外，在20/16°C下，茎和幼叶的表皮细胞中会形成花色素苷，这可能是植物防御光抑制损害的防御策略。巨型芦苇在28/24°C和36/32°C时表现最佳，但在较低温度下，生长速率，干重产量和净CO ₂同化率降低。在最低温度下，与较高温度相比，巨型芦苇叶片中的叶绿素含量明显较高，并且光补偿点较低。这些冷驯化响应增强了低温下巨型芦苇的光合性能，这对于寒冷气候下的生长尤其是在低光照强度下具有优势。结果表明，C ₄杂种纳皮尔草相对于生长温度具有较低的可塑性，令人惊讶的是，在较高的环境温度下其生长减少，而C ₃巨型芦苇则具有更多的塑料并且具有较高的适应潜力，并且在高温下生长最佳。