scholarly journals The influence of light intensity and photoperiod on duckweed biomass and starch accumulation for bioethanol production

2015 ◽  
Vol 187 ◽  
pp. 84-90 ◽  
Author(s):  
Yehu Yin ◽  
Changjiang Yu ◽  
Li Yu ◽  
Jinshan Zhao ◽  
Changjiang Sun ◽  
...  
Keyword(s):  
Light Intensity ◽  
Starch Accumulation ◽  
Bioethanol Production

scholarly journals PSB27: A thylakoid protein enabling Arabidopsis to adapt to changing light intensity

2015 ◽  
Vol 112 (5) ◽  
pp. 1613-1618 ◽  
Author(s):  
Xin Hou ◽  
Aigen Fu ◽  
Veder J. Garcia ◽  
Bob B. Buchanan ◽  
Sheng Luan
Keyword(s):  
Photosystem Ii ◽  
Light Intensity ◽  
Light Adaptation ◽  
Light Exposure ◽  
Starch Accumulation ◽  
State Transitions ◽  
Potential Candidate ◽  
Subsequent Work ◽  
Variable Intensity ◽  
Changing Light

In earlier studies we have identified FKBP20-2 and CYP38 as soluble proteins of the chloroplast thylakoid lumen that are required for the formation of photosystem II supercomplexes (PSII SCs). Subsequent work has identified another potential candidate functional in SC formation (PSB27). We have followed up on this possibility and isolated mutants defective in the PSB27 gene. In addition to lack of PSII SCs, mutant plants were severely stunted when cultivated with light of variable intensity. The stunted growth was associated with lower PSII efficiency and defective starch accumulation. In response to high light exposure, the mutant plants also displayed enhanced ROS production, leading to decreased biosynthesis of anthocyanin. Unexpectedly, we detected a second defect in the mutant, namely in CP26, an antenna protein known to be required for the formation of PSII SCs that has been linked to state transitions. Lack of PSII SCs was found to be independent of PSB27, but was due to a mutation in the previously described cp26 gene that we found had no effect on light adaptation. The present results suggest that PSII SCs, despite being required for state transitions, are not associated with acclimation to changing light intensity. Our results are consistent with the conclusion that PSB27 plays an essential role in enabling plants to adapt to fluctuating light intensity through a mechanism distinct from photosystem II supercomplexes and state transitions.

scholarly journals A submerged duckweed mutant with abundant starch accumulation for bioethanol production

GCB Bioenergy ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 1078-1091
Author(s):  
Yu Liu ◽  
Hua Xu ◽  
Yu Wang ◽  
Xianfeng Tang ◽  
Guo He ◽  
...  
Keyword(s):  
Starch Accumulation ◽  
Bioethanol Production

Genetic engineering of transitory starch accumulation by knockdown of OsSEX4 in rice plants for enhanced bioethanol production

2020 ◽  
Vol 117 (4) ◽  
pp. 933-944 ◽  
Author(s):  
Li‐Fen Huang ◽  
Yu‐Kuo Liu ◽  
Sung‐Chieh Su ◽  
Chih‐Chang Lai ◽  
Ching‐Rong Wu ◽  
...  
Keyword(s):  
Genetic Engineering ◽  
Starch Accumulation ◽  
Bioethanol Production ◽  
Rice Plants ◽  
Transitory Starch

Duckweed starch accumulation for bioethanol production

2011 ◽  
Author(s):  
Weihua Cui ◽  
Jiele Xu ◽  
Jay J Cheng
Keyword(s):  
Starch Accumulation ◽  
Bioethanol Production

scholarly journals Carbohydrate activity regulation of floral quantity during the juvenile phase in black pepper (Piper nigrum L.)

2018 ◽  
Author(s):  
Chao Zu ◽  
Jianfeng Yang ◽  
Zhigang Li ◽  
Can Wang ◽  
Huan Yu
Keyword(s):  
Light Intensity ◽  
Black Pepper ◽  
Piper Nigrum ◽  
Starch Accumulation ◽  
Vegetative Development ◽  
Juvenile Phase ◽  
Key Indicator ◽  
Negative Role ◽  
Carbohydrate Levels ◽  
Carbohydrate Dynamics

AbstractBlack pepper plants maintain synchronous vegetative growth and flowering during their lifetimes, even in the juvenile phase. How to limit the duration of flowering, facilitate a return to vegetative development should be studied. Light intensity has been reported to affect the levels of stored carbohydrates in some horticultural trees. However, it is unclear whether increased flowering intensity in adaptable light intensity is due to the regulation of carbohydrates in black pepper. Here, we report the characterization of carbohydrates and enzyme turnover in major source leaves under shading treatments during the juvenile phase of pepper. In addition to the previous finding that carbohydrate levels are correlated with flowering time, we report the novel finding that carbohydrate contents in the leaves control floral quantity. To gain insights into the underlying physiological mechanisms, we analyzed the effect of shading on sugar contents and floral transition, which revealed that shading regulated carbohydrate levels, an increase in starch accumulation improved floral quantity, and sucrose-starch ratio played a negative role in inflorescence quantity. Based on this analysis, we characterized the changes in enzyme activities in the leaves that affect carbohydrate dynamics and identified the key indicator enzymes and optimal shading intensity for the five developmental periods.HighlightWe identified the key carbohydrates, indicator enzymes and optimal shading intensity to control inflorescence quantity during the juvenile phase in black pepper for labor-saving.

The influence of different plant hormones on biomass and starch accumulation of duckweed: A renewable feedstock for bioethanol production

2019 ◽  
Vol 138 ◽  
pp. 659-665 ◽  
Author(s):  
Yang Liu ◽  
Xiaoyi Chen ◽  
Xinhui Wang ◽  
Yang Fang ◽  
Yin Zhang ◽  
...  
Keyword(s):  
Plant Hormones ◽  
Starch Accumulation ◽  
Bioethanol Production ◽  
Renewable Feedstock

Starch granule size distribution in wheat grain in relation to shading after anthesis

2009 ◽  
Vol 148 (2) ◽  
pp. 183-189 ◽  
Author(s):  
W. LI ◽  
S. YAN ◽  
Y. YIN ◽  
Z. WANG
Keyword(s):  
Light Intensity ◽  
Grain Yield ◽  
Size Distribution ◽  
Starch Granule ◽  
Grain Filling ◽  
Granule Size ◽  
Wheat Starch ◽  
High Yield ◽  
Starch Accumulation ◽  
Starch Granules

SUMMARYGranule size distribution of wheat starch is an important characteristic that may affect the functionality of wheat products. Light intensity is one of the main factors affecting grain yield and quality. Two high-yield winter wheat cultivars were grown under shade to evaluate the effect of low light intensity after anthesis on starch granule size distribution and starch components in wheat grains at maturity. Shading caused a marked drop in both grain yield and starch yield and led to a significant reduction in the proportion (both by volume and by surface area) of B-type starch granules (⩽9·9 μm), with an increase in those of A-type starch granules (>9·9 μm). This would suggest that the production of B-type starch granules was more sensitive to shading than that of A-type starch granules. It was also found that the proportion by volume of A-type starch granules was significantly increased and that of B-type starch granules was significantly decreased by shading at different grain filling stages, especially at middle and late grain-filling stages. However, shading had little effect on the proportional number of B-type starch granules. The present results suggested that, under dim light conditions, the limited substrate for starch accumulation was mainly partitioned towards hypertrophy (larger granules) not hyperplasia (more) of starch granules.

Starch Accumulation in Duckweed for Bioethanol Production

2011 ◽  
Vol 3 (4) ◽  
pp. 187-197 ◽  
Author(s):  
W. Cui ◽  
J. Xu ◽  
J. J. Cheng ◽  
A. M. Stomp
Keyword(s):  
Starch Accumulation ◽  
Bioethanol Production

Fine structure of the retina of the giant scallop, Placopecten magellanicus

1984 ◽  
Vol 42 ◽  
pp. 312-313
Author(s):  
C.V.L. Powell
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Light Intensity ◽  
Scanning Electron Microscope ◽  
Eye Development ◽  
Preliminary Observation ◽  
Columnar Epithelium ◽  
Placopecten Magellanicus ◽  
Environmental Light ◽  
Scanning Electron

The overall fine structure of the eye in Placopecten is similar to that of other scallops. The optic tentacle consists of an outer columnar epithelium which is modified into a pigmented iris and a cornea (Fig. 1). This capsule encloses the cellular lens, retina, reflecting argentea and the pigmented tapetum. The retina is divided into two parts (Fig. 2). The distal retina functions in the detection of movement and the proximal retina monitors environmental light intensity. The purpose of the present study is to describe the ultrastructure of the retina as a preliminary observation on eye development. This is also the first known presentation of scanning electron microscope studies of the eye of the scallop.

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