scholarly journals On the photosynthetic characteristics of high yielding rice varieties. I. Leaf photosynthetic rate.

1990 ◽  
Vol 59 (1) ◽  
pp. 72-79 ◽  
Author(s):  
Fumio NAKAZAWA ◽  
Kousei TUNODA ◽  
Hirofumi TORIKURA
Keyword(s):  
Photosynthetic Rate ◽  
Photosynthetic Characteristics ◽  
Rice Varieties ◽  
Leaf Photosynthetic Rate

scholarly journals Physiological Behaviour and Yield Performances of Hybrid Rice at Different Planting Dates in Aus Season

2014 ◽  
Vol 17 (1-2) ◽  
pp. 7-14
Author(s):  
MM Haque ◽  
HR Pramanik ◽  
JK Biswas
Keyword(s):  
Photosynthetic Rate ◽  
Field Experiments ◽  
Hybrid Rice ◽  
Flag Leaf ◽  
Grain Filling ◽  
Planting Dates ◽  
Rice Varieties ◽  
Leaf Chlorophyll ◽  
Leaf Photosynthetic Rate ◽  
Photosynthetic Activities

Two field experiments were conducted in 2009 and 2010 to evaluate some physiological traits and yield of three hybrid rice varieties (BRRI hybrid dhan2, Heera2, and Tia) in comparison to BRRI dhan48 in Aus season. The experiments involved four planting dates (1 April, 16 April, 1 May and 16 May). Compared to BRRI dhan48, hybrid varieties accumulated greater shoot dry matter at anthesis, higher flag leaf chlorophyll at 2, 9, 16 and 23 days after flowering (DAF), flag leaf photosynthetic rate at 2 DAF and longer panicles. However, hybrid varieties demonstrated smaller remobilization of shoot reserve to grain and photosynthetic rate of its flag leaf at 9 and 16 DAF than BRRI dhan48. Heera2 and BRRI hybrid dhan2 maintained significantly higher chlorophyll a:b ratio over Tia and BRRI dhan48 at 2, 9, 16 and 23 DAF in their flag leaf. Shoot reserve remobilization to grain exhibited higher degree of sensitivity to rising of minimum temperature in the studied hybrids compared to the inbred. Inefficient photosynthetic activities of flag leaf and poor shoot reserve translocation to grain resulted poor grain filling percentage in the test hybrids. Consequently the studied hybrids showed significantly lower grain yield (ca. 36.7%) as compared to inbred BRRI dhan48, irrespective of planting date in Aus season.DOI: http://dx.doi.org/10.3329/brj.v17i1-2.20839Bangladesh Rice j. 2013, 17(1&2): 7-14

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.

scholarly journals Leaf Temperature and Vapour Pressure Deficit (VPD) Driving Stomatal Conductance and Biochemical Processes of Leaf Photosynthetic Rate in a Subtropical Evergreen Coniferous Plantation

2018 ◽  
Vol 10 (11) ◽  
pp. 4063 ◽  
Author(s):  
Yue Li ◽  
Lei Zhou ◽  
Shaoqiang Wang ◽  
Yonggang Chi ◽  
Jinghua Chen
Keyword(s):  
Stomatal Conductance ◽  
Photosynthetic Rate ◽  
Vapour Pressure Deficit ◽  
Leaf Temperature ◽  
Slash Pine ◽  
Seasonal Patterns ◽  
Subtropical China ◽  
Biochemical Processes ◽  
Leaf Photosynthetic Rate ◽  
Positive Effect

Photosynthesis is arguably the most important biochemical process on Earth, which is dramatically influenced by environmental conditions. How environmental factors drive stomatal conductance and biochemical processes of leaf photosynthetic rate has not been sufficiently investigated in subtropical China. In this study, we analysed the effects of stomatal and biochemical parameters on the photosynthetic rate of native Masson’s pine (Pinus massoniana Lamb.) and exotic slash pine (Pinus elliottii Engelm.) in response to leaf temperature and vapour pressure deficit (VPD) in subtropical China, based on leaf gas exchange measurements in 2016. Our results showed that there was no significant difference in the light-saturated photosynthetic rate (Asat) between native Masson’s pine and exotic slash pine. The seasonal patterns of maximum rate of the carboxylation (Vcmax25) were basically consistent with seasonal patterns of Asat for both species. The positive effect of leaf temperature on Asat was mainly produced through its positive effect on Vcmax25. Leaf temperature had no significant effect on stomatal conductance. Vcmax25 and gs simultaneously affected Asat in response to VPD. Our results highlighted the importance of biochemical processes in limiting leaf photosynthetic rate in response to environmental conditions in subtropical evergreen coniferous plantations.

QTL analysis of leaf photosynthetic rate and related physiological traits in rice (Oryza sativa L.)

Euphytica ◽  
2004 ◽  
Vol 135 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Sheng Teng ◽  
Qian Qian ◽  
Dali Zeng ◽  
Yasufumi Kunihiro ◽  
Kan Fujimoto ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Photosynthetic Rate ◽  
Qtl Analysis ◽  
Oryza Sativa L ◽  
Physiological Traits ◽  
Leaf Photosynthetic Rate

scholarly journals Effects of Potassium Silicate Fertilizer on Photosynthetic Characteristics and Yield in Winter Wheat (Triticum Aestivum L.)

2021 ◽  
Vol 50 (4) ◽  
pp. 1127-1132
Author(s):  
Wubo Li ◽  
Meng Li ◽  
Yunshuo Xu ◽  
Yan Shi
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Photosynthetic Characteristics ◽  
Potassium Silicate ◽  
Existence Time ◽  
1000 Grain Weight

Effects of different dosages of potassium silicate fertilizer on photosynthetic characteristics and yield of winter wheat under field conditions were studied. Four different dosages: 0, 45, 90 and 135kg/ha were applied. Results showed that the chlorophyll content, net photosynthetic rate of wheat flag leaf firstly increased and then decreased with the increase of levels of potassium silicate fertilizer. By the change of SPAD values after flowering, when the application of potassium silicate fertilizer was 90 kg/ha, the existence time of chlorophyll in flag leaf was significantly long, and the net photosynthetic rate was significantly increased. The 1000-grain weight of winter wheat significantly increased and the yield the highest. Overall, when the applied amount of potassium silicate fertilizer was 90 kg/ha, the performances of winter wheat were best. Bangladesh J. Bot. 50(4): 1127-1132, 2021 (December)

Effects of leaf development and phosphorus supply on the photosynthetic characteristics of perennial legume species with pasture potential: modelling photosynthesis with leaf development

2010 ◽  
Vol 37 (8) ◽  
pp. 713 ◽  
Author(s):  
Lalith D. B. Suriyagoda ◽  
Hans Lambers ◽  
Megan H. Ryan ◽  
Michael Renton
Keyword(s):  
Photosynthetic Rate ◽  
Leaf Development ◽  
Developmental Stages ◽  
Dark Respiration ◽  
Leaf Age ◽  
Light Response ◽  
Photosynthetic Characteristics ◽  
Light Intensities ◽  
Perennial Legume ◽  
Convexity Parameter

Age-dependent changes in leaf photosynthetic characteristics (i.e. parameters of the light response curve (maximum photosynthetic rate (Pmax), quantum yield (Φ) and the convexity parameter (θ)), stomatal conductance (gs) and dark respiration rate (Rd)) of an exotic perennial legume, Medicago sativa L. (lucerne), and two potential pasture legumes native to Australia, Cullen australasicum (Schltdl.) J.W. Grime and Cullen pallidum A. Lee, grown in a glasshouse for 5 months at two phosphorus (P) levels (3 (P3) and 30 (P30) mg P kg–1 dry soil) were tested. Leaf appearance rate and leaf area were lower at P3 than at P30 in all species, with M. sativa being the most sensitive to P3. At any leaf age, photosynthetic characteristics did not differ between P treatments. However, Pmax and gs for all the species and Φ for Cullen species increased until full leaf expansion and then decreased. The convexity parameter, θ, did not change with leaf age, whereas Rd decreased. The estimates of leaf net photosynthetic rate (Pleaf) obtained through simulations at variable Pmax and Φ were lower during early and late leaf developmental stages and at lower light intensities than those obtained when Φ was assumed to be constant (e.g. for a horizontally placed leaf, during the 1500°C days developmental period, 3 and 19% reduction of Pleaf at light intensities of 1500 and 500 µmol m–2 s–1, respectively). Therefore, developmental changes in leaf photosynthetic characteristics should be considered when estimating and simulating Pleaf of these pasture species.

Altitudinal trends in photosynthetic rate and leaf characteristics of Miscanthus populations from central Taiwan

2001 ◽  
Vol 49 (4) ◽  
pp. 509 ◽  
Author(s):  
Wen-Yuan Kao ◽  
Kuo-Wei Chang
Keyword(s):  
Photosynthetic Rate ◽  
Altitudinal Gradient ◽  
Stomatal Density ◽  
Leaf Width ◽  
Leaf Mass Per Area ◽  
Leaf Characteristics ◽  
Cell Dimensions ◽  
Gradient Measurements ◽  
Central Taiwan ◽  
Leaf Photosynthetic Rate

Leaf photosynthetic rate and leaf characteristics including chlorophyll content, leaf width, leaf mass per area (LMA), stomatal density and the dimensions of guard cells were measured in C 4 Miscanthus spp. growing along an altitudinal gradient from 390 to 2700 m in central Taiwan. The main objective of this study was to understand if morphological and physiological variation occur in leaves of the C 4 plants growing along the altitudinal gradient. Measurements were taken during the growing season, May, July and September, of 1997. Photosynthetic rate, leaf width and guard cell dimensions decreased while LMA and stomatal density increased with altitude. The pattern of continuous variation in the analysed parameters suggests that it is related to some underlying environmental factors (mainly air temperature and CO 2 concentration) associated with changing altitude.

Sign in / Sign up

Export Citation Format

Share Document