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Nodule Formation in Phaseolus Mungo L. Under Different Photoperiods

M. M. Hossain
Department of Botany, University of Chittagong, Bangladesh.

B. N. Saha
Department of Botany, University of Chittagong, Bangladesh.

Abstract/ Executive Summary:

Phaseolus mango L. plants were exposed to different photo- periods. Plants grown under long day conditions produced significantly higher amount of nodules. Fresh weight of both aerial and underground plant parts and the amount of total sugar per plant were also higher under long day conditions. Flower and fruit formation in plants occurred only under short day conditions.

Keywords: Nodule formation,Mungu, Photoperiods

Location: Department of Botany, University of Rajsbahi

Start Date: 10-06-1976

End Date: 19-10-1976

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

This paper reports the nodule formation in Phaseolus mungo L. in response to different day length

Methodology:

The seeds of 'Mushkalai' (P. mungo L.). a commercial pulse yielding, short day plant (Hossain, 1971 ) were purchased from the Rajsbahi market. Seeds were grown on sand culture medium containing all the nutritional elements according to Pryanishnikov (1945), except potassium ( Hossain et a/. 1976). Eight- teen kilograms of sand, collected from the river bed of Padma, was taken in each cylindrical green-house pot ( 36 X 30 cm) made of thick galvanized sheet. Care was taken for well aeration of the culture medium of its entire depth, pH of the medium was 7 and the field capacity of sand was 30. The experiment was carried out from l0th June. 1976 to 19th October, 1976 in the department of Botany, University of Rajsbahi. Total number of green. house pots used in this experiment was 30 and each pot contained eight equidistant plants. Upto the age of 57 days the seedlings of all pots were kept growing under the natural day length. At this age the plants were about 25 cm in height. Random separation of the pots into two equal groups was then made. Group 1 was exposed to eight hours day length ( short day, from 9 O'Clock morning to 5 O'CIC'ck evening). Group 2 was kept exposed to the usual day length conditions ( approximately 13 hours. long day) till the end of the experiment. Water content maintained in the culture medium was 60% F. C. Nodule content and fresh weight of aerial parts and roots were determined at 62. 99, 114 and 129 days after the germination of seeds. Mean of seven plants in each estimation was taken. Content of total sugars per plant was estimated by biochemical method (Plesh- kov, 1968). Test for significant difference among the treatment means was done following t-test ( Steel and Torri, 1960).

Source of Information: Bangladesh J. Agri), Sci. 6 (1) ; 27-32 ; 1979

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Plants grown under long day conditions produced significantly higher amount of nodules. Fresh weight of both aerial and underground plant parts and the amount of total sugar per plant were also higher under long day conditions. Flower and fruit formation in plants occurred only under short day conditions.

Knowledge Management: Journal