My Humble Opinions on High Photosynthetic Efficiency of Crop

Jianfeng, Cheng

doi:10.3724/sp.j.1006.2010.01235

Cited by 5 publications

(3 citation statements)

References 44 publications

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“…Although maize grain yield has increased significantly in developed hybrids (Hu et al, 1998a), both leaf area index (LAI) and HI have remained constant (Cheng and Shen, 2010). Therefore, the observed increases in grain yield of maize hybrids have resulted from increased dry matter accumulation (Hu et al, 1998b; Tollenaar, 1991).…”

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confidence: 99%

Radiation Interception and Use Efficiency Contributes to Higher Yields of Newer Maize Hybrids in Northeast China

et al. 2015

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A signifi cant trend of decreasing solar radiation has been observed in Northeast China over the past six decades. Such a decline in solar radiation could negatively impact maize (Zea mays L.) production. Th e improved cultivated hybrids may have adapted to these changes in solar radiation. In this study, four commonly cultivated maize hybrids in Northeast China were selected for a 2-yr fi eld study. Two hybrids were released in the 1970s and the other two were released in the 1990s. In comparison with the maize hybrids released in the 1970s, the maize hybrids released in the 1990s exhibited signifi cant increases in both dry matter at maturity (P < 0.05) and grain yields (P < 0.05), although the harvest index (HI) showed no signifi cant diff erence. Th e greater dry matter accumulation was primarily responsible for the yield increase observed in the 1990s' hybrids. Th e greater dry matter accumulation occurred primarily during the tasseling-to-maturity stage. Our results indicated signifi cant improvements (P < 0.05) in crop growth rate and radiation use effi ciency (RUE) in 1990s' hybrids, particularly during the tasseling-to-maturity stage. Additionally, the net photosynthetic rate (NPR) of the ear-leaf before 1200 h was also signifi cantly improved in the 1990s' hybrids. Th e fraction of photosynthetically active radiation (PAR) interception on the third leaf above the ear-leaf was increased during the tasseling-to-maturity stage and signifi cantly correlated with maize grain yields (P < 0.01), indicating that the increase in the fraction of PAR interception at this layer contributed to the higher grain yield in the 1990s hybrids.

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confidence: 99%

Radiation Interception and Use Efficiency Contributes to Higher Yields of Newer Maize Hybrids in Northeast China

et al. 2015

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“…Photosynthesis is the physiological basis for crop growth and yield formation 28 . Higher yield and biomass can be obtained by maintaining higher leaf physiological activity and improving photosynthetic e ciency [29][30][31] . The photosynthesis of maize was mainly controlled by the cultivation measures and fertilizer 32,33 .…”

Section: Discussionmentioning

confidence: 99%

Potentials of straw return and potassium supply on maize (Zea mays L.) photosynthesis, dry matter accumulation and yield

Fan

Gao

Sun

et al. 2021

Preprint

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Maize (Zea mays L.) is considered one of the most important grains in the world. Straw return and potassium fertilization can enhance the maize yield. Therefore, three field experiments were carried out in the three years (2018–2020) to study the effects of straw return at two methods and four levels of potassium fertilization on photosynthesis, dry matter accumulation and yield of the maize ‘Xianyu 335’. To conduct the field trials, a split plot system in five replications was established. Two straw return methods (straw return with deep tillage and straw mulching with no tillage) were in the main plots, and four potassium fertilization levels (0, 30, 45 and 60 kg/ha) were in the subplots. Each sub-plot consisted of 10 rows with 5 m length and 0.6 m width, and each sub-plot area was 30 m2 in the three years. The results indicated that the straw return methods and the potassium supply significantly affected the maize photosynthesis, dry matter accumulation and yield in the three years. Under the same potassium supply, straw return with deep tillage significantly improved the maize photosynthesis, dry matter accumulation and yield compared to straw mulching with no tillage. The above characteristics improved with increased potassium supply. The treatment of SFK60 recorded the highest values for the parameters of maize photosynthesis, dry matter accumulation and yield during the three harvest seasons. The treatment of SFK45 reached maximum profit of maize planting, which was 12088.77 yuan/ha. Therefore, SFK45 was an effective way to ensure the stable and higher yields of maize and to maximize the income of farmers.

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“…Photosynthetic photon ux density (PPFD) signi cantly affects not only the leaf morphological characteristics (e.g., photosynthetic pigment content) (Feng et al 2009;Yao et al 2015), but also the leaf photosynthetic physiological characteristics (e.g., photosynthetic electron transport rate and photosynthetic carbon assimilation e ciency) in plants (Yao et al 2016;Cheng et al 2010). These characteristics have a signi cant regulatory effect on the photosynthetic capacity and LUE of plant leaves (Rawat et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Physiological Regulation Mechanism of VIRESCENT-ALBINO LEAF 1 in Rice (Oryza sativa L.)

Li,

Yang,

Jiao

et al. 2024

Preprint

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Improving photosynthetic potential and light use efficiency is a crucial way to increase rice yield. The virescent-albino leaf 1 (val1) mutant, wild-type ‘Jinhui 10’ (WT), and VAL1 gene overexpression plants (VAL1-OE) were used to determine the physiological mechanisms of survival strategy in val1 mutant and improvement of photosynthetic potential in VAL1-OE through investigating leaf photosynthetic characteristics, photoprotection processes and yield. The results showed that, compared with WT, the expressions of key genes in photosynthetic pathway and chlorophyll contents in val1 mutant were both significantly lower at the early growth stage and higher at the late growth stage. Besides, the photosynthetic electron transport rate, the quantum yield of photosystem II and I, and carboxylation efficiency in val1 mutant were significantly lower than those in WT at the early growth stage, but significantly higher at the late growth stage. Furthermore, the non-photochemical quenching (NPQ) of val1 mutant was significantly higher than WT, thereby optimizing the heat dissipation pathway on the basis of reducing the chlorophyll contents and light absorption at the early growth stage. The NPQ and cyclic electron flow (CEF) were significantly higher in val1 mutant than WT at the late growth stage, resulting in the improvements of light use efficiency and photosynthetic acclimation under both low and high light conditions. Compared with WT, the expressions of key genes in photosynthetic pathway and chlorophyll contents were significantly higher in VAL1-OE. The photosynthetic electron transport rate, quantum yield of photosystem II and I, and the carboxylation efficiency in VAL1-OE were significantly higher than those in WT, improving light use efficiency and carboxylation efficiency of VAL1-OE. Overall, the val1 mutant survived by the optimal plant phenotype and leaf photoprotection pathway at the early growth stage, and improved photosynthetic potential and light use efficiency at the late growth stage. VAL1-OE improved light absorption by optimizing the dissipation pathway of excess light energy so as to increase light use efficiency and carboxylation efficiency. Cultivating phenotypic materials with high leaf area on the basis of high photosynthesis rate in VAL1-OE could be a breakthrough in high photosynthetic efficiency rice breeding.

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My Humble Opinions on High Photosynthetic Efficiency of Crop

Cited by 5 publications

References 44 publications

Radiation Interception and Use Efficiency Contributes to Higher Yields of Newer Maize Hybrids in Northeast China

Radiation Interception and Use Efficiency Contributes to Higher Yields of Newer Maize Hybrids in Northeast China

Potentials of straw return and potassium supply on maize (Zea mays L.) photosynthesis, dry matter accumulation and yield

Photosynthetic Physiological Regulation Mechanism of VIRESCENT-ALBINO LEAF 1 in Rice (Oryza sativa L.)

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