Relationship of the chlorophyll content with the biomass and disperse structure of phytoplankton

Chlorophyll a and b contents were determined in developing tomato fruit (Lycopersicon esculentum Mill. `Heinz 1350') at 5-day increments from 10 or 15 days past anthesis to fulIy ripe (55 to 60 days). When presented on a whole-fruit basis, chlorophyll a and b contents increased from 15 days past anthesis to 35 days and then decreased to zero at 55 days. Porphobilinogen (EC 4.2.1.24; PBG) deaminase activity was measured in extracts from the fruit, and changes in PBG deaminase activity correlated with changes in chlorophyll and protein contents with respect to fruit age. Partial characterization of tomato PBG deaminase enzyme showed similarities to PBG deaminase enzymes isolated from other sources.

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Evaluation of SPAD and LCC based nitrogen management in rice (Oryza sativa L.)

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v34i4.5841 ◽

1970 ◽

Vol 34 (4) ◽

pp. 661-672 ◽

Cited By ~ 9

Author(s):

M Sh Islam ◽

MSU Bhuiya ◽

S Rahman ◽

MM Hussain

Keyword(s):

Chlorophyll Content ◽

Lower Amount ◽

Flower Initiation ◽

Plant Analysis ◽

Rice Varieties ◽

Chlorophyll Contents ◽

Spad Value ◽

Leaf Chlorophyll ◽

Relationship Of ◽

Nitrogen Contents

A study was conducted during Boro and T. Aman seasons of 2002 at Bangladesh Rice Research Institute (BRRI), Gazipur to see the relationship of SPAD (Soil plant analysis development) reading with chlorophyll and N contents of leaves and to determine the critical LCC value for rice crops. Hybrid varieties Sonarbangla-1 and BRRI hybrid dhan0l were used for both rice crops and BRRI dhan29 and BRRI dhan31 were used as checks for Boro and T. Aman crops, respectively. Sonarbangla-1, BRRI hybrid dhan0l and BRRI dhan29 had similar leaf chlorophyll contents in Boro season. The maximum chlorophyll content (1.6-1.8 mg/g leaf) was observed at 39-42 soil plant analysis development (SPAD) value. In T. Aman season, the inbred BRRI dhan3l showed lower amount of chlorophyll (1.2-1.4 mg/g leaf) at 39-42 SPAD value compared to the hybrids Sonarbangla-1 and BRRI hybrid dhan 0l. Seasonal variation in chlorophyll content between Sonarbangla-1 and BRRI hybrid dhan0l was not large. Relationship between SPAD value and chlorophyll content was very close (R2 =>0.8) at panicle initiation and flower initiation stages for all the varieties. Similar relationship was also observed in case of SPAD value and nitrogen content in leaves. The results indicated that the rice leaves showing higher SPAD readings (>35) had higher chlorophyll and nitrogen contents. The adjusted critical LCC values were 3.0 for Boro and 3.5 for T. Aman seasons for all rice varieties. Key Words: Chlorophyll; nitrogen.DOI: 10.3329/bjar.v34i4.5841Bangladesh J. Agril. Res. 34(4) : 661-672, December 2009

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Circadian rhythms of dark respiration, flowering, net photosynthesis, chlorophyll content, and dry weight changes in Chenopodium rubrum

Canadian Journal of Botany ◽

10.1139/b72-288 ◽

1972 ◽

Vol 50 (11) ◽

pp. 2219-2226 ◽

Cited By ~ 23

Author(s):

Ah-Sing Chia-Looi ◽

Bruce G. Gumming

Keyword(s):

Circadian Rhythms ◽

Chlorophyll Content ◽

Dark Respiration ◽

Net Photosynthesis ◽

Dry Weight ◽

Chenopodium Rubrum ◽

Weight Changes ◽

Physiological Processes ◽

Dark Fixation ◽

Relationship Of

There are circadian rhythmic changes in dark respiration, net photosynthesis, chlorophyll content, and dry weight in Chenopodium rubrum, ecotype 60°47′ N, 137°32′ W. The rhythm in dark respiration has a period of about 27 h and its phasing is quite closely correlated with the rhythm in flowering response, which has a period of about 30 h. A close similarity in the periodicity (21 h) and phasing of the rhythms in net photosynthesis and chlorophyll content suggests that the photosynthetic rhythm may be partly attributed to rhythmic changes in chlorophyll content. The rhythmic changes in dry weight, with a period of 18 h, could be due to a rhythm in dark fixation of carbon dioxide. The possible relationship of rhythmicity in these processes to other circadian rhythms that occur in C. rubrum is discussed. The concurrent existence of various rhythms in biochemical and physiological processes that differ in period and phase within a single ecotype of C. rubrum clearly reflects the possible involvement of metabolic activity in circadian rhythms.

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Relationship of porphobilinogen deaminase activity to chlorophyll content and development of 'Heinz 1350' tomato fruit

10.31274/rtd-180813-8958 ◽

1984 ◽

Author(s):

Robert Waring McMahon

Keyword(s):

Chlorophyll Content ◽

Tomato Fruit ◽

Porphobilinogen Deaminase ◽

Relationship Of

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Relationship of Photosynthetic Effectiveness of Different Kinds of Light to Chlorophyll Content and Chloroplast Structure in Greening Wheat and in Ivy Leaves

Australian Journal of Biological Sciences ◽

10.1071/bi9720215 ◽

1972 ◽

Vol 25 (2) ◽

pp. 215 ◽

Cited By ~ 17

Author(s):

JT O Kirk ◽

DJ Goodchild

Keyword(s):

Chlorophyll Content ◽

Platinum Electrode ◽

Chloroplast Structure ◽

Plant Leaves ◽

Higher Plant ◽

Relationship Of

A polarographic technique for the study of photosynthesis in higher plant leaves, using a bare platinum electrode of the Haxo and Blinks type, is described.

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RELATIONSHIP BETWEEN CHLOROPHYLL CONTENT AND NEEDLE COLOR OF Abies religiosa KUNTH, SCHLTDL. et CHAM

Revista Fitotecnia Mexicana ◽

10.35196/rfm.2020.2.233 ◽

2020 ◽

Vol 43 (2) ◽

pp. 233

Author(s):

Aglaen L. Carbajal-Navarro ◽

Fernando Pineda-García ◽

Cuauhtémoc Sáenz-Romero ◽

Arnulfo Blanco-García ◽

Mariela Gómez-Romero ◽

...

Keyword(s):

Chlorophyll Content ◽

Chlorophyll Concentration ◽

Stress Index ◽

Physiological Status ◽

Technical Equipment ◽

Environmental Response ◽

Leaf Chlorophyll ◽

Visual Stress ◽

Abies Religiosa ◽

Relationship Of

Evaluation of the physiological performance of plants as an environmental response is crucial to understand the ecological succession in plant communities and to implement strategies that increase plant survival and growth for restoration efforts and commercial plantations; however, evaluating plant physiology often requires complex and expensive technical equipment not normally accessible to all researchers and non-specialized people. In the present study, we explored the relationship of the visual condition of the needles with an indicator of their photosynthetic capacity related to chlorophyll content in Abies religiosa. A visual stress index was developed to evaluatethe response to environmental stress in seedlings of A. religiosa during a reforestation effort, and the correlation between leaf chlorophyll content and different categories of the stress index. The replicability of the index was also tested to determine its applicability by non-specialized people. A high correlation was detected between the index and chlorophyll concentration (r2 = 0.76; P < 0.0001). Additionally, there was a significant agreement on the index among several observers (W = 0.95; P < 0.0001). Overall, the stress index is related the physiological condition of the plants and can be adopted by people, after training, to make evaluations of the physiological status of A. religiosa seedlings.

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CORRELATIONS OF CITRUS LEAF CHLOROPHYLL WITH LEAF MINERAL CONTENT

HortScience ◽

10.21273/hortsci.27.6.669c ◽

1992 ◽

Vol 27 (6) ◽

pp. 669c-669

Author(s):

Robert E. Rouse

Keyword(s):

Chlorophyll Content ◽

Mineral Content ◽

Nutrient Elements ◽

Mineral Analysis ◽

Chlorophyll Meter ◽

Standard Curve ◽

Leaf Chlorophyll ◽

Citrus Leaves ◽

Relationship Of ◽

The Relationship

The Minolta chlorophyll meter SPAD-502 (Minolta Camera Company, 101 Williams Drive, NJ 07446, USA) has been found to be a quick, accurate, simple, and nondestructive way to determine chlorophyll content in citrus leaves and a standard curve had been developed. The SPAD-502 chlorophyll meter was used to measure chlorophyll content in citrus leaves of ten varieties on three rootstocks. Leaf mineral analysis was then determined on these leaves for N, P, K, Mg, Mn, Zn, Fe, Cu and Ca. Correlation r values were generally low and not significant for most nutrient elements but were highest for Fe and Ca. The relationship of leaf nutrient levels and chlorophyll meter readings are not understood. The usefulness of the SPAD chlorophyll meter for determining mineral content in citrus leaves is not yet known.

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