Further Evidence of Meiotic Instability Induced by Atrazine in Grain Sorghum

Lee, K. C.; Rao, G.M.V. Prasada; Barnett, F. L.; Liang, G. H.

doi:10.1508/cytologia.39.697

Cited by 24 publications

(15 citation statements)

References 12 publications

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“…9) were observed exclusively in the first treatment of lasso (Table 2) might be due to the disturbed type of spindle apparatus and irregular chromosome move ment (Liang et al 1967, Amer and Ali 1968, Amer and Farah 1968, Reddy and Rao 1978 The present cytological studies indicate that certain aberrations like stickiness, bridges, and micronuclei make the gametes less competitive than normal ones limiting their transmission to the subsequent generation (Liang et al 1969). Lee et al (1974) further hypothesised that cytologically aberrant pollen, if viable and competitive could give rise to plants of abnormal chromosome constitution through union with normal or abnormal megaspore. Chances of survival of such offsprings probably would be very low, since they would ordinarily be unstable, low in fertility and deficient in general survival value.…”

Section: Meiotic Chromosomal Abnormalitiesmentioning

confidence: 60%

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Cytogenetic effects of agricultural chemicals. II. Effects of herbicides "lasso and basagran" on chromosomal mechanism in relation to yield and yield components in chilli (capsicum annuum L.)

Reddy

Rao

1982

CYTOLOGIA

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Section: Meiotic Chromosomal Abnormalitiesmentioning

confidence: 60%

“…Induced cytological variability together with natural selection pressure may provide circumstances favourable for the development of new poten tially troublesome strains of weeds (Lee et al 1974). …”

Section: Meiotic Chromosomal Abnormalitiesmentioning

confidence: 99%

Cytogenetic effects of agricultural chemicals. II. Effects of herbicides "lasso and basagran" on chromosomal mechanism in relation to yield and yield components in chilli (capsicum annuum L.)

Reddy

Rao

1982

CYTOLOGIA

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“…Lee et al (1974) stated that chances for the survival of offsprings developed from aberrant pollen would be very low as they are un stable and low in fertility. So the yield loss can be attributed to high percentage of sterility .…”

Section: Discussionmentioning

confidence: 99%

Cytological effects of agricultural chemicals. II. Effects of fungicides "Bavistin" and "Deltan" on chilli (Capsicum annuum L.).

1988

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Chilli, the essential condiment and popular vegetable is a lucrative commercial crop of India. Despite large area under chilli cultivation, the production is far from satisfactory. The sensitivity of most of the cultivars to a variety of diseases is one of the factors for low pro ductivity. A great emphasis has already been laid on the economic aspects of plant diseases on major crops. To overcome the plant disease problem, use of plant protection chemicals has become a necessary and accepted practice in agriculture. They provide a dependable, rapid, effective and economical means of controlling the majority of crop pests. While the use of the chemicals to control diseases is indispensable, the frequent indiscriminate use may have many undesirable consequences (Srihari Raddy and Madhusudhana Rao 1981, 1982). The present investigation was carried out in order to elucidate the effect of two fungicides Bavistin and Deltan on germination, survival, meiosis and pollen fertility in relation to yield and yield components in chilli employing x235 a popular local variety as the experimental material. Materials and methodsTwo fungicides Bavistin (2-methyl benzimidazole carbamate) and Deltan (n-(trichloro methyl thio)-4-cyclohexene-1, 2-dicarboximide) of three different concentrations each (0.04%, 0.08%, 0.12% and 0.1%, 0.2%, 0.3%) were selected. For germination and survival studies 300 healthy seeds were soaked separately in different concentrations of the fungicides for 48 hours. After the treatment seeds were washed and allowed to germinate in petriplates. Germi nation counts were recorded on 15th day followed by the survival counts from 30 day-old seedlings sown in pots.Foliar application: Seeds were raised separately in a nursery bed and 40 day-old seedlings were transplanted in the field in a randomisedly designed blocks in three replications. After the crop attained the age of flowering, aqueous solutions of the aforementioned fungicides in three different concentrations were sprayed at regular intervals of 10 days each for four times. Plants sprayed with distilled water served as control. Meiotic studies were made using aceto carmine squash technique. Pollen viability was tested from the buds collected before anthesis at regular intervals of 5 days, after the completion of sprayings.To estimate the yield, fruits were collected from a total of 15 plants for each concentration covering all replications. ObservationsThe data on germination and seedling survival are represented in Fig. I A

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“…While the results from bacteria and mammal test systems are almost all negative, atrazine exhibits clear mutagenic effects in different plant test systems, by inducing chromosome aberrations in Hordeum vulgare and Vicia faba [96,97], in Zea mays [98], in Sorghum vulgare [99] and in Allium cepa [62] ; sister chromatid exchanges in maize [100] ; and point mutation in maize [98].…”

Section: Atrazinementioning

confidence: 99%