Effect of Day and Night Temperature Difference on Photosynthesis,Photosynthetic Activity and Energy Dissipation of Tomato During Fruit Expanding Stage(PDF)
《北方园艺》[ISSN:1001-0009/CN:23-1247/S]
- Issue:
- 2018年12
- Page:
- 67-72
- Research Field:
- Publishing date:
Info
- Title:
- Effect of Day and Night Temperature Difference on Photosynthesis,Photosynthetic Activity and Energy Dissipation of Tomato During Fruit Expanding Stage
- Author(s):
- YUAN Xiaokang1; 2
- (1.School of Applied Meteorology,Nanjing University of Information Science ＆ Technology,Nanjing,Jiangsu 210044;2.Hunan Research Institute of Meteorological Sciences,Changsha,Hunan 410118)
- Keywords:
- day and night temperature difference; tomato; fruit expanding stage; photosynthesis; energy dissipation
- PACS:
- -
- DOI:
- 10.11937/bfyy.20173675
- Abstract:
- In order to study the effect of day and night temperature difference on photosynthesis,photosynthetic activity and energy dissipation of tomato during fruit expanding stage,one experiment was conducted in climate chambers.Five day/night temperature regimes 16 ℃/34 ℃,19 ℃/31 ℃,25 ℃/25 ℃,31 ℃/19 ℃ and 34 ℃/16 ℃ with respective DIF of -18 ℃,-12 ℃,0 ℃,+12 ℃ and +18 ℃ at a common 25 ℃ mean daily temperature were used.The results showed that chlorophyll a (Chl a),chlorophyll b (Chl b),net photosynthetic rate(Pn),stomatal conductance (Gs),maximum quantum yield of PSII photochemistry (Fv/Fm)and photochemical quenching (qP) and so on,significantly increased under positive DIF while decreased with negative DIF,which were larger under +12 ℃ DIF than that of +18 ℃ DIF.DIF also influenced energy dissipation,the non-regulation of energy dissipation,regulation of energy dissipation and photo excess degree increased under negative DIF while decreased under positive DIF.Therefore,positive DIF promoted photosynthesis while negative DIF inhibited photosynthesis and led to photoinhibition.Pn decreased under negative DIF due to non-stomatal limitation.
Last Update: 2018-07-13