Altering light–dark cycle at pre-harvest stage regulated growth, nutritional quality, and photosynthetic pigment content of hydroponic lettuce

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Mingjie Shao ◽  
Wenke Liu ◽  
Lingyan Zha ◽  
Chengbo Zhou ◽  
Yubin Zhang ◽  
...  
Keyword(s):  
Nutritional Quality ◽  
Photosynthetic Pigment ◽  
Pigment Content ◽  
Dark Cycle ◽  
Photosynthetic Pigment Content

Study on the Photosynthetic Efficiency of the Bauhinia blakeana Leaves by Using Photo-Acoustic Tomography Technology

2013 ◽  
Vol 807-809 ◽  
pp. 1010-1014
Author(s):  
Gan Wen Lie ◽  
Guang Hua Lie ◽  
Ding Chao Pan ◽  
Long Hua Ye ◽  
Dong Yu Li
Keyword(s):  
Optical Absorption ◽  
Photosynthetic Efficiency ◽  
Photosynthetic Pigment ◽  
Pigment Content ◽  
Optical Absorption Coefficient ◽  
Growth Time ◽  
Acoustic Tomography ◽  
Single Beam ◽  
Green Leaves ◽  
Photosynthetic Pigment Content

By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage detection, the photo-acoustic tomography spectroscopy and optical absorption properties of green and yellow leaves ofBauhinia blakeanawere studied. The results show that: the photo-acoustic tomography spectroscopy ofBauhinia blakeanaleaves could be obtained from different chopping frequency and different sample positions, and photosynthetic pigment content of their leaves is closely related to their photosynthetic intensity. The more photosynthetic pigment content the leaves ofBauhinia blakeanacontain, the bigger optical absorption coefficient and the higher photosynthetic efficiency they have. The photosynthetic pigment content of the green leaves ofBauhinia blakeanais higher than that of the yellow ones. As a result, the photosynthesis of green leaves is better than that of the yellow ones. According to the results of our research, the photosynthetic efficiency ofBauhinia blakeanacould be improved and its growth time could be effectively controlled to enhance the growth ofBauhinia blakeana. Furthermore, it could play an important role on the development of forestry, and meet the need of forest for 6 billion people. The research showed high science value to the study and applications of the photosynthesis of plants.

Study on the Photosynthetic Efficiency of the Bischofia javanica Leaves by Using Photo-Acoustic Tomography Technology

2013 ◽  
Vol 807-809 ◽  
pp. 596-600
Author(s):  
Gan Wen Lie ◽  
Guang Hua Lie ◽  
Hou Zhu Mao ◽  
Dong Yu Li
Keyword(s):  
Optical Absorption ◽  
Photosynthetic Efficiency ◽  
Photosynthetic Pigment ◽  
Pigment Content ◽  
Optical Absorption Coefficient ◽  
Growth Time ◽  
Acoustic Tomography ◽  
Green Leaves ◽  
Photosynthetic Pigment Content ◽  
Bischofia Javanica

By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage detection, the photo-acoustic tomography spectroscopy, optical absorption properties and photosynthetic pigment content of green and red leaves ofBischofia javanicawere studied. The results show that: the photo-acoustic tomography spectroscopy ofBischofia javanicaleaves could be obtained from different chopping frequency and different sample positions, and photosynthetic pigment content of their leaves is closely related to their photosynthetic intensity. The more photosynthetic pigment content the leaves ofBischofia javanicacontain, the bigger optical absorption coefficient and the higher photosynthetic efficiency they have. The photosynthetic pigment content of the green leaves ofBischofia javanicais higher than that of the red ones. As a result, the photosynthesis of green leaves is better than that of the red ones. According to the results of our research, the photosynthetic efficiency ofBischofia javanicacould be improved and its growth time could be effectively controlled to enhance the growth ofBischofia javanica. Furthermore, it could play an important role on the development of forestry, and meet the need of forest for 6 billion people. The research showed high science value to study and applications of the photosynthesis of plants.

Study on the Photosynthetic Efficiency of the Cinnamomum camphora Leaves by Using Photo-Acoustic Tomography Spectroscopy Technology

2012 ◽  
Vol 550-553 ◽  
pp. 1443-1447
Author(s):  
Guang Hua Lie ◽  
Gan Wen Lie ◽  
Han Lan Ke ◽  
Ting Yang ◽  
Dong Yu Li ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Absorption Coefficient ◽  
Damage Detection ◽  
Photosynthetic Efficiency ◽  
Photosynthetic Pigment ◽  
Pigment Content ◽  
Optical Absorption Coefficient ◽  
Acoustic Tomography ◽  
Cinnamomum Camphora ◽  
Photosynthetic Pigment Content

By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage detection, the photo-acoustic tomography spectroscopy, optical absorption properties and photosynthetic pigment content of the green and yellow leaves of Cinnamomum camphora were studied. The results show that: photo-acoustic tomography spectroscopy could be obtained from different chopping frequency and different sample position. The more photosynthetic pigment content the leaves of Cinnamomum camphora contains, the bigger optical absorption coefficient and the higher photosynthetic efficiency they have. In the research, we could find that the photosynthetic pigment content of the green leaves of Cinnamomum camphora is higher than that of the red ones. As a result, the optical absorption coefficient and the photosynthetic efficiency of the green ones are higher than the red ones. The photo-acoustic tomography spectroscopy technology could be a kind of non-damage detection to confirm the growth of trees.

Study on the Photosynthetic Efficiency of the Osmanthus fragrans Leaves by Using Photo-Acoustic Tomography Spectroscopy Technology

2013 ◽  
Vol 641-642 ◽  
pp. 979-983
Author(s):  
Guang Hua Lie ◽  
Gan Wen Lie ◽  
Hua Lin Cai ◽  
Han Lan Ke ◽  
Ding Chao Pan
Keyword(s):  
Optical Absorption ◽  
Absorption Coefficient ◽  
Damage Detection ◽  
Photosynthetic Efficiency ◽  
Photosynthetic Pigment ◽  
Pigment Content ◽  
Optical Absorption Coefficient ◽  
Acoustic Tomography ◽  
Osmanthus Fragrans ◽  
Photosynthetic Pigment Content

By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage detection, the photo-acoustic tomography spectroscopy, optical absorption properties and photosynthetic pigment content of the green and yellow leaves of Osmanthus fragrans were studied. The results show that: photo-acoustic tomography spectroscopy could be obtained from different chopping frequency and different sample position. The more photosynthetic pigment content the leaves of Osmanthus fragrans contains, the bigger optical absorption coefficient and the higher photosynthetic efficiency they have. In the research, we could find that the photosynthetic pigment content of the green leaves of Osmanthus fragrans is higher than that of the yellow ones. As a result, the optical absorption coefficient and the photosynthetic efficiency of the green ones are higher than the yellow ones. The photo-acoustic tomography spectroscopy technology could be a kind of non-damage detection to confirm the growth of trees.

scholarly journals The effect of copper on the abundance, cell morphology and content of photosynthetic pigments in the microalga Porphyridium purpureum

2019 ◽  
Vol 4 (4) ◽  
pp. 34-40
Author(s):  
Zh. V. Markina ◽  
N. A. Aizdaicher
Keyword(s):  
Copper Concentration ◽  
Photosynthetic Pigment ◽  
Cell Number ◽  
Pigment Content ◽  
Porphyridium Purpureum ◽  
Second Stage ◽  
Photosynthetic Pigment Content ◽  
Effect Of Copper ◽  
Adaptive Abilities ◽  
Copper Intoxication

Red microalga Porphyridium purpureum adaptive abilities to copper intoxication were studied. Cell number dynamics and morphology, contents of chlorophyll a and carotenoids were used as test-points. The experiment was conducted in two stages. At the first stage the effect of copper in concentrations of 50 and 100 µg·l−1 was studied; at the second stage the alga adaptive abilities to growth in copper contaminated medium were assessed. At the first stage copper concentration of 50 µg·l−1 didn’t influence the parameters under study. Addition of 100 µg·l−1 caused growth inhibition and photosynthetic pigment content decrease. At the second stage after transferring alga to a medium with 50 µg·l−1 copper concentration from a medium with similar conditions, cell number and photosynthetic pigment content were not significantly different from the control ones. Part of the cells deformed, chloroplasts became darkened. Transferring to a medium with 100 µg·l−1 from a medium with 50 µg·l−1 copper concentration caused growth delay; most of the cells in suspension were with dark, granulated chloroplast. Cells transferring from a medium with 100 µg·l−1 to a medium with the same concentration resulted in growth inhibition and photosynthetic pigment content decrease. Part of the cells in suspension became lager than in control and with great amount of mucilage. Complete adaptation of P. purpureum to copper intoxication didn’t occur.

scholarly journals Growth and photosynthetic pigment content in Salvia hispanica L. with macronutrient omission in nutrient solution

Científica ◽  
2018 ◽  
Vol 46 (3) ◽  
pp. 324
Author(s):  
Gilvanda Leão Dos Anjos ◽  
Francielle Medeiros Costa ◽  
Celicleide Quaresma Lobo ◽  
Aline Dos Anjos Souza ◽  
Girlene Santos De Souza ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Photosynthetic Pigment ◽  
Pigment Content ◽  
Salvia Hispanica ◽  
Photosynthetic Pigment Content ◽  
Salvia Hispanica L
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