Comparison on the Photosynthesis of Seedlings ofPrunus serotina and Prunus serrulata

LI Liang-hou; LI Ji-yue; FU Xiang -jian; LI Gao-yang

W ith L I??6400 portab le photo synthesis systems, the net photosynthet ic rate ( Pn ) , stom ata l conduct??ance ( G s ) and in terce llu lar CO2 concentra tion ( C i ) under natura l full light cond itions w ere compared forP runus serru lata from Guang shan C ounty , H enan Prov ince, P. serotina from Pennsy lvan ia and On tario. The re??sults show ed that: ( 1 ) P. serrula ta had the max imum da ily averag e amoun t of Pn, Gs, and Ci, w h ich w ere6. 381??mo l·m- 2 ·s-1, 0. 200 mo l·m- 2 ·s-1, and 251. 7 ??mo l·mo l- 1 respect iv ely, and the average a??moun ts of seedling s o f Pennsy lvan ia provenances w ere them ed ium, they w ere 5. 550 ??mo l·m- 2 ·s-1, 0. 151mo l·m- 2 ·s-1, and 234. 7 ??mo l·mo l- 1 respective ly, and the averag e amoun ts o f seed lings o fOn tario prove??nance w ere the least, they w ere 4. 952 ??mo l·m- 2 ·s-1, 0. 134 mo l·m- 2 ·s-1, and 230. 1 ??m ol·mo l- 1respective ly. ( 2) Pn, Gs and C i had sign ifican tly d ifferences among these species. ( 3 ) The da ily variat ion o fPn w as sim ilar, therew as on ly one peak of Pn in a day, bu t the Pn o f p lants of Pennsy lvan ia provenance reached the peak earlier than that o f the o ther tw o k inds of seedling s. The da ily var iation o fC i w as sim ilar, too. C i de??creased gradua lly from mo rn ing to them in imum in the a fternoon and increased a little la ter, bu t the Ci of plantsof Pennsylvan ia provenance fell them in imum earlier than that o f the o ther tw o k inds o f seed lings. The da ily va ri??at ion o fG s w as sim ilar, too.

1. College ofNatu ralR esou rces and Environment , Bei jing Forestry Un ivers ity, Beijing?? 100083, China

2. Hen anA cad emy of Forestry, Zh engzhou?? 450008, Hen an, China

3. The Key Laboratory for S ilviculture and Con servation ofM in istry ofEducation , Bei jing ForestryUn iversity , Beijing?? 100083, China

4. Hen an Inst itu te o fM eteorology, Zhengzhou?? 450008, H enan, China

5. Hen anA cad emy of Forestry, Zh engzhou?? 450008, Hen an, China

Received Date: 2006-03-09

Abstract: W ith L I??6400 portab le photo synthesis systems, the net photosynthet ic rate ( Pn ) , stom ata l conduct??ance ( G s ) and in terce llu lar CO2 concentra tion ( C i ) under natura l full light cond itions w ere compared forP runus serru lata from Guang shan C ounty , H enan Prov ince, P. serotina from Pennsy lvan ia and On tario. The re??sults show ed that: ( 1 ) P. serrula ta had the max imum da ily averag e amoun t of Pn, Gs, and Ci, w h ich w ere6. 381??mo l·m- 2 ·s-1, 0. 200 mo l·m- 2 ·s-1, and 251. 7 ??mo l·mo l- 1 respect iv ely, and the average a??moun ts of seedling s o f Pennsy lvan ia provenances w ere them ed ium, they w ere 5. 550 ??mo l·m- 2 ·s-1, 0. 151mo l·m- 2 ·s-1, and 234. 7 ??mo l·mo l- 1 respective ly, and the averag e amoun ts o f seed lings o fOn tario prove??nance w ere the least, they w ere 4. 952 ??mo l·m- 2 ·s-1, 0. 134 mo l·m- 2 ·s-1, and 230. 1 ??m ol·mo l- 1respective ly. ( 2) Pn, Gs and C i had sign ifican tly d ifferences among these species. ( 3 ) The da ily variat ion o fPn w as sim ilar, therew as on ly one peak of Pn in a day, bu t the Pn o f p lants of Pennsy lvan ia provenance reached the peak earlier than that o f the o ther tw o k inds of seedling s. The da ily var iation o fC i w as sim ilar, too. C i de??creased gradua lly from mo rn ing to them in imum in the a fternoon and increased a little la ter, bu t the Ci of plantsof Pennsylvan ia provenance fell them in imum earlier than that o f the o ther tw o k inds o f seed lings. The da ily va ri??at ion o fG s w as sim ilar, too.

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Reference (14)

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Comparison on the Photosynthesis of Seedlings ofPrunus serotina and Prunus serrulata

Abstract

References

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通讯作者: 陈斌, bchen63@163.com

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