scholarly journals Photosystem II Excitation Pressure and Development of Resistance to Photoinhibition (II. Adjustment of Photosynthetic Capacity in Winter Wheat and Winter Rye)

1996 ◽  
Vol 110 (1) ◽  
pp. 61-71 ◽  
Author(s):  
G. R. Gray ◽  
L. V. Savitch ◽  
A. G. Ivanov ◽  
NPA. Huner
Keyword(s):  
Photosystem Ii ◽  
Winter Wheat ◽  
Photosynthetic Capacity ◽  
Winter Rye ◽  
Development Of Resistance ◽  
Excitation Pressure

FACTORS AFFECTING THE COLD SURVIVAL OF WINTER CEREALS

1977 ◽  
Vol 57 (1) ◽  
pp. 213-219 ◽  
Author(s):  
L. V. GUSTA ◽  
D. B. FOWLER
Keyword(s):  
Winter Wheat ◽  
Cold Tolerance ◽  
Winter Rye ◽  
Factors Affecting ◽  
Winter Cereals ◽  
Higher Temperature ◽  
Thawing And Freezing Cycles

Several parameters affecting cold tolerance of winter cereals in artificial freeze tests were examined. Supercooling followed by freezing resulted in death occurring at a higher temperature than when freezing was initiated just below 0 C. The cold tolerance of fully acclimated crowns of winter wheat and a winter rye were reduced an average of 5 C after two thawing and freezing cycles. The duration of freezing in artificial freeze tests has a significant effect on the LD50 of winter cereals. Rapid thawing (2–4 C/min) resulted in death occurring at a higher temperature than slow thawing (0.5–2 C/h).

The effects of phenotypic plasticity on photosynthetic performance in winter rye, winter wheat and Brassica napus

2011 ◽  
Vol 144 (2) ◽  
pp. 169-188 ◽  
Author(s):  
Keshav Dahal ◽  
Khalil Kane ◽  
Winona Gadapati ◽  
Elizabeth Webb ◽  
Leonid V. Savitch ◽  
...  
Keyword(s):  
Phenotypic Plasticity ◽  
Brassica Napus ◽  
Winter Wheat ◽  
Photosynthetic Performance ◽  
Winter Rye

scholarly journals Physiological and developmental traits associated with the grain yield of winter wheat as affected by phosphorus fertilizer management

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiu-Xiu Chen ◽  
Wei Zhang ◽  
Xiao-Yuan Liang ◽  
Yu-Min Liu ◽  
Shi-Jie Xu ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Dry Matter ◽  
Photosynthetic Capacity ◽  
Growth Stages ◽  
Photosynthetic Parameters ◽  
Dry Matter Accumulation ◽  
Grain Yields ◽  
P Concentration ◽  
Spike Number

Abstract Although researchers have determined that attaining high grain yields of winter wheat depends on the spike number and the shoot biomass, a quantitative understanding of how phosphorus (P) nutrition affects spike formation, leaf expansion and photosynthesis is still lacking. A 3-year field experiment with wheat with six P application rates (0, 25, 50, 100, 200, and 400 kg P ha−1) was conducted to investigate this issue. Stem development and mortality, photosynthetic parameters, dry matter accumulation, and P concentration in whole shoots and in single tillers were studied at key growth stages for this purpose. The results indicated that spike number contributed the most to grain yield of all the yield components in a high-yielding (>8 t/ha) winter wheat system. The main stem (MS) contributed 79% to the spike number and tiller 1 (T1) contributed 21%. The 2.7 g kg−1 tiller P concentration associated with 15 mg kg−1 soil Olsen-P at anthesis stage led to the maximal rate of productive T1s (64%). The critical shoot P concentration that resulted in an adequate product of Pn and LAI was identified as 2.1 g kg−1. The thresholds of shoot P concentration that led to the maximum productive ability of T1 and optimal canopy photosynthetic capacity at anthesis were very similar. In conclusion, the thresholds of soil available P and shoot P concentration in whole plants and in single organs (individual tillers) were established for optimal spike formation, canopy photosynthetic capacity, and dry matter accumulation. These thresholds could be useful in achieving high grain yields while avoiding excessive P fertilization.

Note on the Wheat Bulb Fly (Leptohylemyia coarctata, Fall.)

1925 ◽  
Vol 15 (4) ◽  
pp. 359-360 ◽  
Author(s):  
H. M. Morris
Keyword(s):  
Great Britain ◽  
Winter Wheat ◽  
Winter Barley ◽  
Winter Rye ◽  
Young Shoot ◽  
Severe Damage ◽  
Couch Grass ◽  
Complete Destruction ◽  
Serious Injury

This insect has been known for many years as the cause of serious loss to the wheat crops in this country and on the Continent, having been first recognised in 1882, although it probably occurred before that year. In some seasons the damage occasioned by this fly is so severe as to cause the almost complete destruction of the crop in some fields, although more often it results in the crop being made thin and patchy. The damage first becomes apparent in March and April, when the leading shoot of the young plants attacked turns yellow and the plant if small or weak dies off. The injury is caused by the older larva, which feeds within the young shoot. This destruction of the young plants usually occurs in patches about the field, and the bare patches so caused increase in size owing to the larvae moving in the soil from plant to plant, each larva being thus able to destroy several plants. In addition to winter wheat this pest can attack winter barley and winter rye, although such attacks are rare in this country. It can also attack couch grass. Neither oats nor any other crop is attacked. In Great Britain the most severe damage due to this insect has generally occurred in the eastern countries of England and Scotland, although serious injury has also occurred in various other districts, and the severity of the attack has varied enormously from season to season. Damage due to this pest has also been reported from Middle and South Russia, Germany, Austria, Holland, Sweden, Norway, Denmark, France, Tunisia and Mesopotamia.

Low temperature delays development of photosystem II activity in winter rye leaves

1989 ◽  
Vol 77 (1) ◽  
pp. 115-122 ◽  
Author(s):  
Marilyn Griffith ◽  
Heather C. H. McIntyre ◽  
Marianna Krol
Keyword(s):  
Low Temperature ◽  
Photosystem Ii ◽  
Winter Rye ◽  
Photosystem Ii Activity

Grain yield of winter rye and winter wheat in relation to leaf number and leaf age.

1971 ◽  
Vol 19 (4) ◽  
pp. 250-256
Author(s):  
H.D. Gmelig Meyling
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Leaf Age ◽  
Leaf Number ◽  
Winter Rye ◽  
Grain Yields ◽  
Proportional Increase

In trials in 1966-7, removal of the upper leaves of wheat and rye at heading gave lower yields of grain and straw than removal of the lower leaves. Removal of all leaves reduced grain yields of winter rye by 44% and winter wheat by 43%. The proportional increase in stem weight after flowering compared with that of ear weight, was appreciably greater in rye than in wheat. (Abstract retrieved from CAB Abstracts by CABI’s permission)

IMPACT OF PRE-SOWING TREATMENT OF SEEDS BY SUPERWEAK ELECTROMAGNETIC FIELDS OF EXTREMELY-HIGH FREQUENCY ON PRODUCTIVITY AND QUALITY OF WINTER WHEAT GRAIN

2016 ◽  
Vol 11 (1) ◽  
pp. 52-57
Author(s):  
Морозов ◽  
Gennadiy Morozov ◽  
Таланов ◽  
Pavel Talanov ◽  
Таланов ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Electromagnetic Fields ◽  
Root Rot ◽  
High Frequency ◽  
Seed Treatment ◽  
Winter Rye ◽  
Wheat Grain ◽  
Extremely High Frequency ◽  
Sowing Seed

The article presents the results of studies on the effect of pre-sowing seed treatment by electromagnetic impact to reduce phytopathogens on seeds, involvement of plants by root rot and leafy mycosis and improving the productivity and quality of winter rye grain.

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