scholarly journals Pollen performance decreases with plant age for outcrosser but not selfer: evidence for cost of male performance

2019 ◽  
Vol 106 (9) ◽  
pp. 1271-1278
Author(s):  
Daniel A. Malagon ◽  
Morgan D. Roche ◽  
Robert M. McElderry ◽  
Susan Kalisz
Keyword(s):  
Plant Age ◽  
Pollen Performance ◽  
Male Performance

Diseases of perennial bean grasses in Western Siberia

2020 ◽  
Author(s):  
Lyudmila Ashmarina
Keyword(s):  
Western Siberia ◽  
Weather Conditions ◽  
Plant Age ◽  
Intensity Of Development ◽  
Resistance Of Varieties

The directions and results of many years of research on the development and prevalence of diseases on perennial leguminous grasses (meadow clover, pannonian clover, sainfoin, sowing alfalfa) in Western Siberia are presented. A whole range of diseases was revealed, the intensity of development, which depends on weather conditions, resistance of varieties, plant age, etc.

Flowering of Crownvetch as Affected by Thermo‐Inductive Treatment, Photoperiod, Plant Age, and Genotype 1

Crop Science ◽  
1972 ◽  
Vol 12 (5) ◽  
pp. 553-557
Author(s):  
G. W. McKee ◽  
M. L. Risius ◽  
A. R. Langille
Keyword(s):  
Plant Age ◽  
Genotype 1 ◽  
Inductive Treatment

Hydraulic Conductivity of Cotton Roots as Influenced by Plant Age and Rooting Medium

1991 ◽  
Vol 83 (1) ◽  
pp. 264-266 ◽  
Author(s):  
G. S. Brar ◽  
B. L. McMichael ◽  
H. M. Taylor
Keyword(s):  
Hydraulic Conductivity ◽  
Plant Age ◽  
Rooting Medium

scholarly journals Effects of Plant Age and Root Damage on Internalization of Shiga Toxin-Producing Escherichia coli in Leafy Vegetables and Herbs

Horticulturae ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 68
Author(s):  
Yi-Ju Wang ◽  
Amanda J. Deering ◽  
Hye-Ji Kim
Keyword(s):  
Escherichia Coli ◽  
Plant Species ◽  
Shiga Toxin ◽  
Production Systems ◽  
Plant Age ◽  
Leafy Vegetables ◽  
Root Damage ◽  
Hygiene Practices ◽  
Hydroponic Systems ◽  
Stx1 Gene

Our previous study reported that fresh produce grown in aquaponic and hydroponic systems can pose potential food safety hazards due to an accidental introduction of contaminated fish and cross-contamination between the systems. In this study, we examined the effects of plant species and age on the likelihood and level of internalization of Shiga toxin-producing Escherichia coli (STEC) in aquaponic and hydroponic systems. Four plant species, basil (Ocimum basilicum L. cv. Genovese), cilantro (Coriandrum Sativum L.), lettuce (Lactuca sativa cv. Cherokee), and kale (Brassica oleracea var. sabellica), received root damage treatment as seedlings before transplanting or mature plants at three weeks after transplanting by cutting off 1-cm tips of one-third of the roots. Enrichments and selective media were used for the isolation, and presumptive positive colonies were confirmed by PCR for the presence of stx1 gene in plant tissues, recirculating water, and fish feces collected at four weeks after transplanting. In hydroponic systems, STEC was found neither in the solution nor in the roots and leaves of all four plant species, possibly through improved sanitation and hygiene practices. However, consistent with our previous findings, STEC was found in the water, on the plant roots, and in the fish feces in aquaponic systems, even after thorough sanitation prior to the study. Regardless of plant age, STEC was internalized in the roots of all plant species when the roots were damaged, but there was no difference in the degree of internalization with STEC among plant species. STEC was present in the leaves only when seedlings received root damage treatment and were grown to maturity, indicating that root damage allows STEC to internalize in the roots within a week, but a longer period is required for STEC to internalize into the leaves. We concluded that root damage on seedlings can cause the internalization of E. coli O157:H7 in the edible parts of leafy vegetables and herbs in soilless production systems.

Plant age and attack by the bud galler, Euura mucronata

Oecologia ◽  
1987 ◽  
Vol 73 (3) ◽  
pp. 334-337 ◽  
Author(s):  
P. W. Price ◽  
H. Roininen ◽  
J. Tahvanainen
Keyword(s):  
Plant Age

The influence of plant age on wound induction of proteinase inhibitors in tomato

1995 ◽  
Vol 95 (3) ◽  
pp. 423-427 ◽  
Author(s):  
J.-J. Alarcon ◽  
M. Malone
Keyword(s):  
Proteinase Inhibitors ◽  
Plant Age ◽  
Wound Induction

EPTC Plus R-25788 Injury to Corn (Zea Mays) as Affected by Plant Age at Treatment

Weed Science ◽  
1979 ◽  
Vol 27 (4) ◽  
pp. 460-462 ◽  
Author(s):  
G. W. Burt ◽  
C. A. Buzio
Keyword(s):  
Zea Mays ◽  
Plant Height ◽  
Plant Age ◽  
Entire Period ◽  
Respective Control ◽  
Height Reduction ◽  
Stages Of Growth ◽  
Greenhouse Study ◽  
Herbicide Treatment

The susceptibility of corn (Zea maysL. ‘Pioneer 3334A’) at different stages of growth to EPTC (S-ethyl dipropylthiocarbamate) plus a herbicide-protectant, R-25788 (N,N-diallyl-2,2-dichloroacetamide), was studied in the greenhouse. Corn was treated with either 25 ppm or 12.5 ppm EPTC containing R-25788 at planting and at 2, 4, 6, and 8 weeks thereafter. The herbicide was soil-applied and immediately incorporated by watering. Phytotoxicity and plant height were observed periodically for 56 days after herbicide treatment. Within 21 days after treatment with 25 ppm EPTC containing R-25788, injury and plant height reduction occurred in corn treated at planting, or at 2 and 4 weeks but not at 6 or 8 weeks after planting. At 56 days, however, corn treated at planting or 2 weeks after planting had outgrown all injury symptoms and was as tall as the controls (>84%). Corn treated at 4 weeks after planting, however, still remained injured and was 45% as tall as its respective control. Corn treated at 6 to 8 weeks showed no injury during the entire period of observations. The data indicates that corn is most susceptible to EPTC plus R-25788 at 4 weeks after planting. The results of this greenhouse study are discussed in relation to corn injury as observed in the field.

Sign in / Sign up

Export Citation Format

Share Document