National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW 2678, Australia.
Funct Plant Biol. 2021 Dec;49(1):54-67. doi: 10.1071/FP21271.
To examine the interactive effect of temperature and photon flux density (PFD) on growth dynamics and gas exchange of young Vitis vinifera L. cv. Shiraz vines, a controlled environment study was conducted by exposing vines to two different temperatures combined with either high or low PFD. Shoot growth was accelerated and the phyllochron of Shiraz leaves was hastened in the low temperature (25/12°C)×low PFD condition (350μmolm-2s-1). In early emerging leaves, leaf area was responsive to temperature whereas in later emerging leaves it was dependent on light intensity. The high temperature (32/20°C)×high PFD (700μmolm-2s-1) treatment delayed internode extension of early emerging internodes. However, low temperature×high PFD increased leaf gas exchange across the different growth stages. The net shoot carbon balance was greater for the low temperature×high PFD treatment. Dry matter accumulation was also greater in early emerging internodes irrespective of treatment. These results on young Shiraz vines indicate that 25°C is favourable to 32°C, and some growth characteristics are accelerated at low PFD while others favour higher PFD.
为了研究温度和光量子通量密度（PFD）对年轻的酿酒葡萄品种 Shiraz 生长动态和气体交换的互作效应，通过将葡萄暴露在两种不同温度下，并结合高光强或低光强条件下，进行了一项控制环境研究。在低温（25/12°C）×低 PFD（350μmolm-2s-1）条件下，Shiraz 叶片的生长加快，叶龄期缩短。在早期出现的叶片中，叶面积对温度敏感，而在后期出现的叶片中，叶面积则取决于光强。高温（32/20°C）×高光强（700μmolm-2s-1）处理延迟了早期出现的节间的伸长。然而，低温×高光强增加了不同生长阶段的叶片气体交换。低温×高光强处理的净枝碳平衡更大。无论处理如何，早期出现的节间的干物质积累也更大。这些关于年轻 Shiraz 葡萄藤的结果表明，25°C 比 32°C 更有利，一些生长特性在低 PFD 下加快，而其他特性则有利于更高的 PFD。
