Comparison of the photosynthetic responses to temperature and light of Betulamaximowicziana and Betulaplatyphylla var. japonica
Comparison of the photosynthetic responses to temperature and light of Betulamaximowicziana and Betulaplatyphylla var. japonica
复制标题
大白桦和白桦对温度和光照的光合作用响应比较
DOI：
10.1139/x85-103
复制
发表时间：
1985
影响因子：
2.2
通讯作者：
Y. Sakagami
中科院分区：
文献类型：
--
作者：
T. Koike;Y. Sakagami
白桦Betula maximowicziana Regel和白桦Betulaplatyphylla var.日本原木是北海道常见演替早期树种。研究了10年生杨树向阳树冠早、晚叶CO2交换速率与叶片生长的关系。B叶片的绿色期。阔叶树比B长10-15天。maximowicziana。两种植物的净光合速率在7月上旬达到最大值，8月上旬出现短暂下降，9月下旬日最低气温低于10 °C时开始下降。两种植物的净光合作用的最适温度范围为10 ~ 20 °C，光合光子通量密度为525 μE·−2·s−1;而B的净光合作用最适温度范围为10 ~ 20 °C，光合光子通量密度为525 μE·−2·s−1。 maximowicziana在此最适值以上的下降速度比B快。阔叶树。温度与呼吸速率关系的拐点出现在早叶15 °C左右，晚叶20 °C左右。灯光C…
Betula maximowicziana Regel and Betulaplatyphylla var. japonica Hara are common early successional tree species in Hokkaido. The CO2 exchange rates of early and late leaves in the sunny crown of 10-year-old trees were investigated in relation to leaf growth. The green period of the leaves of B. platyphylla was 10–15 days longer than that of B. maximowicziana. Net photosynthesis of both species attained a maximum toward early July, declined temporarily in early August, and decreased from late September, when the daily minimum temperature fell below 10 °C. The optimal temperature for net photosynthesis in both species ranged between 10 and 20 °C, under a photosynthetic photon flux density of 525 μE•−2•s−1; however, net photosynthesis of B. maximowicziana declined more rapidly above this optimum, as compared with B. platyphylla. The inflection point of the relationship between temperature and respiration rates of both species occurred around 15 °C in early leaves, and around 20 °C in late leaves. The light c...