Diurnal changes in net photosynthetic rate in potato in two environments

1988 ◽  
Vol 31 (3) ◽  
pp. 375-378 ◽  
Author(s):  
Joginder Singh Manhas ◽  
N. P. Sukumaran
Keyword(s):  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Diurnal Changes

Diurnal changes in net photosynthetic rate of Pueraria lobata and its impact factors

2011 ◽  
Vol 13 (1) ◽  
pp. 57-63
Author(s):  
You-fang Ding ◽  
Cai-yun Wang ◽  
Neo C. Mokgolodi ◽  
Xiao-xia Zhang ◽  
Ling-ling Shi ◽  
...  
Keyword(s):  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Impact Factors ◽  
Pueraria Lobata ◽  
Diurnal Changes

Effects of Potassium Fertilizer on Diurnal Change of Photosynthesis in Stevia Rebaudiana Bertoni

2011 ◽  
Vol 343-344 ◽  
pp. 1087-1091 ◽  
Author(s):  
Lei Ma ◽  
Guang Xi Ren ◽  
Yan Shi
Keyword(s):  
Net Photosynthetic Rate ◽  
Chlorophyll Content ◽  
Chlorophyll A ◽  
Photosynthetic Rate ◽  
Stevia Rebaudiana ◽  
Diurnal Change ◽  
Diurnal Changes ◽  
Potassium Fertilizer ◽  
Midday Depression ◽  
Stevia Rebaudiana Bertoni

The effects of potassium fertilizer on diurnal change of photosynthesis in Stevia rebaudiana Bertoni had been studied. Diurnal changes of net photosynthetic rate (Pn) and environmental and physiological traits in leaves of Stevia rebaudiana Bertoni were measured using LI-6400 portable photosynthesis system. The results showed that optimal potassium fertilizer can increased chlorophyll content and improved photosynthesis rate and decreased the chlorophyll a/b ratio. At the same time, midday depression of photosynthesis abated or disappeared.

scholarly journals Photosynthetic Product Allocations to the Organs of Pinus massoniana Are Not Affected by Differences in Synthesis or Temporal Variations in Translocation Rates

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 471
Author(s):  
Xiuxiu Deng ◽  
Zheng Shi ◽  
Lixiong Zeng ◽  
Lei Lei ◽  
Xuebing Xin ◽  
...  
Keyword(s):  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Co2 Concentration ◽  
Pinus Massoniana ◽  
Temporal Variations ◽  
Mean Value ◽  
Diurnal Changes ◽  
13C Pulse Labeling ◽  
Pinus Massoniana Lamb ◽  
Photosynthetic Products

Photosynthesis and the allocation of photosynthetic products are the two main factors that determine plant growth. To understand the growth and productivity of Pinus massoniana Lamb., the diurnal changes in photosynthetic rate were continuously monitored. Furthermore, the translocation and allocation of the photosynthetic products synthesized in the morning and afternoon were explored using 13C pulse labeling. The results showed that: (1) on sunny days, the diurnal variation of the net photosynthetic rate showed a “double peak” curve, with an obvious “a depression” when temperatures were highest and humidity lowest. On cloudy days, it showed an irregular “jagged” curve, which was curve consistent with the variations in photosynthetically active radiation (PAR). Meanwhile, the photosynthetic rate changed with the transient changes in environmental factors such as PAR, temperature, and humidity. (2) The mean value of the net photosynthetic rate in the morning was higher than in the afternoon, and the response of the net photosynthetic rate to environmental change (PAR, temperature, humidity, and CO2 concentration) in the morning was greater than that in the afternoon. (3) The translocation of photosynthetic products synthesized in the afternoon was faster than that in the morning. Shortly after synthesis of photosynthetic products, the translocation of products synthesized in the morning tended toward upper organs (including current-year leaves and 1-year leaves), while the translocation of products synthesized in the afternoon decreased in the upper organs. However, after 15 days of 13C pulse labeling, the allocation of the photosynthetic products synthesized in the morning and afternoon tended to be the same. These results indicate that the differences in the photosynthetic products synthesized and the temporal differences in the translocation rates did not affect the final allocation of the photosynthetic products in the various organs of the P. massoniana. These results improve our knowledge of the functional phases of P. massoniana during the diurnal cycle.

Photosynthetic Characteristics for Mongolian Scots Pine Plantation and its Relation with Environmental Factors

2011 ◽  
Vol 393-395 ◽  
pp. 1334-1340 ◽  
Author(s):  
Jie Zhang ◽  
Zhao Gang Liu
Keyword(s):  
Environmental Factors ◽  
Net Photosynthetic Rate ◽  
Scots Pine ◽  
Photosynthetic Rate ◽  
Intercellular Co2 Concentration ◽  
Light Response ◽  
Co2 Concentration ◽  
Dynamic Responses ◽  
Diurnal Changes ◽  
Long Time

The needles' light dynamic response for net photosynthetic rate (Pn), the diurnal changes of net photosynthetic rates of annual Mongolian Scots pine and the relationship between of its Pn and environmental factors were studied in this paper by using LI-6400 portable photosynthesis system. Results show that needles at different positions of the crown have different light response for their net photosynthetic rate. Pn, photosynthetic saturated light intensity (PSLI) and light compensation point (LCP) of needles decreased from upper-crown through mid-crown to lower-crown. It suggests that different light dynamic responses of needles at different positions be related to micro-light environment to which needles acclimated in a long time. Diurnal variation of Pn showed a single peak. It had significantly positive correlation with stomatal conduction (Cond), transpiration rate (Tr) (at 0.01 level) and photosynthetically active radiation (PAR) (at 0.05 level), and significantly negative correlation with the intercellular CO2 concentration (Ci) (at 0.05 level).

Diurnal variation in net photosynthetic rate and influencing environmentalfactors of Elaeagnus mollis Diels leaf

2009 ◽  
Vol 17 (3) ◽  
pp. 474-478
Author(s):  
Qun-Long LIU ◽  
Chan-Juan NING ◽  
Duo WANG ◽  
Guo-Liang WU ◽  
Hong-Mei ZHANG ◽  
...  
Keyword(s):  
Diurnal Variation ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Elaeagnus Mollis

scholarly journals Changes in peanut canopy structure and photosynthetic characteristics induced by an arbuscular mycorrhizal fungus in a nutrient-poor environment

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yinli Bi ◽  
Huili Zhou
Keyword(s):  
Net Photosynthetic Rate ◽  
Leaf Area ◽  
Photosynthetic Rate ◽  
Mycorrhizal Fungus ◽  
Canopy Structure ◽  
Arbuscular Mycorrhizal ◽  
Photosynthetic Characteristics ◽  
Total Leaf Area ◽  
Tiller Angle ◽  
Amf Inoculation

AbstractA well-developed canopy structure can increase the biomass accumulation and yield of crops. Peanut seeds were sown in a soil inoculated with an arbuscular mycorrhizal fungus (AMF) and uninoculated controls were also sown. Canopy structure was monitored using a 3-D laser scanner and photosynthetic characteristics with an LI-6400 XT photosynthesis system after 30, 45 and 70 days of growth to explore the effects of the AMF on growth, canopy structure and photosynthetic characteristics and yield. The AMF colonized the roots and AMF inoculation significantly increased the height, canopy width and total leaf area of the host plants and improved canopy structure. AMF reduced the tiller angle of the upper and middle canopy layers, increased that of the lower layer, reduced the leaf inclination of the upper, middle and lower layers, and increased the average leaf area and leaf area index after 45 days of growth, producing a well-developed and hierarchical canopy. Moreover, AMF inoculation increased the net photosynthetic rate in the upper, middle and lower layers. Plant height, canopy width, and total leaf area were positively correlated with net photosynthetic rate, and the inclination angle and tiller angle of the upper leaves were negatively correlated with net photosynthetic rate. Overall, the results demonstrate the effects of AMF inoculation on plant canopy structure and net photosynthetic rate.

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