摘要
庐山山地上的银杏（ＧｉｎｋｇｏｂｉｌｏｂａＬｉｎｎ．），其叶片的光合作用在夏季晴天有明显的午休现象，这可能与气孔关闭和光抑制有关．其光补偿点为２５μｍｏｌ（ｐｈｏｔｏｎｓ）·ｍ－２·ｓ－１左右，光饱和净光合速率为５～７μｍｏｌ（ＣＯ２）·ｍ－２·ｓ－１，表观光合量子需要量约为１９，光合作用的ＣＯ２补偿点大于１０－４。
A field study on the photosynthetic characteristics in Ginkgo biloba Linn. was conducted using a CI 301 PS Portable Photosynthesis System as a measuring device. The results showed that the reasons of midday photosynthetic depression were possibly stamotal limitation and photoinhibition of photosynthesis. The light compensation point was 25 μmol (photons)·m -2 ·s -1 or so, and the light saturating photosynthetic rate measured in leaves was in a range of 5￣7 μmol (CO 2)·m -2 ·s -1 ,and the lowest apparent quantum required was about 19. The CO 2 compensation concentration of photosynthesis was a little more than 1×10 -4 , indicating that G. biloba was a C 3 type plant.
出处
《生态科学》
CSCD
1997年第1期30-33,共4页
Ecological Science
