Leaf Characteristics and Yield Performance of Mungbean (<i>Vigna radiata</i> L.) Varieties under Different Levels of Shading

Abstract

An experiment was carried out to evaluate the leaf characteristics and yield performances of mungbean (Vigna radiata L.) under different light levels at the Crop Physiology and Ecology Research Field of Hajee Mohammad Danesh Science and Technology University, Dinajpur during March to June 2016. The experiment was laid out in a split plot design with three replications. Three light levels (L 100 -100 % light intensity, L 75 -75 % light intensity and L 50 -50% light intensity) were assigned in the main plots and four varieties (BARl Mung-6, BINA Mung-8, BINA Mung-5 and BU Mug-4) were assigned in subplots. Mosquito nets of different pore size were used for maintaining 75 and 50 percent light intensity. Leaf area was increased due to reduced light levels in all mugbean varieties but the increment was significant in BINA Mung-5 and BINA Mung-8 only at 75% light intensity at 40 days after sowing and only in BARI Mung-6 with L 50 and BU Mug-4 with L 75 and L 50 at 50 days after sowing. Due to reduced light levels, leaf dry weight was affected more in BINA Mung-5 and BU Mug-4 than BARI Mung-6 and BINA Mung-8. Leaf thickness was reduced under shade in all the mungbean varieties, except in BU Mug-4 at 75% light intensity, and the reduction in leaf thickness was mainly due to the reduction in thickness of spongy layer. The palisade layer thickness was influenced insignificantly but spongy layer thickness was increased in BINA Mung-5 at 100% light intensity. The grain yields (t ha , and heavier grains in BARI Mung-6 and BINA Mung-8 contributed to the higher grain yield plant -1 under partial shade condition than in BINA Mung-5 and BU Mug-4.

​Identification of Low Light Tolerant Blackgram Varieties with Respect to Morpho-physiology and Yield

“…The varieties that have grown taller (DBGV 5, CO 6 and Sumanj ana) were found adapted to partially shaded conditions by stem elongation for radiation energy capture and use in photosynthesis. Similar results of increment in plant height with shade was observed by Lakshmamma and Rao (1996) in blackgram and Hossain et al (2017) and Nair (2020) in green gram under partially shaded coconut garden. Keuskamp et al (2010) reported that as shading stimulates the synthesis of auxin and gibberellins, plant show increased height and etiolated leaves, since these hormones promotes cell division, cell elongation, apical dominance and inter nodal elongation.…”

Genome-wide association studies for earliness, MYMIV resistance, and other associated traits in mungbean (Vigna radiata L. Wilczek) using genotyping by sequencing approach

“…Also, Tripathi et al (2020) reported similar h 2 for DFF (62.5%), DFPF (83.6%) and DHPF (95%). Leaf area ranged for leaflets from 99.42 cm 2 (33.21/leaf) to 221.30 cm 2 (73.76/leaf), Similarly, Hossain et al (2017) observed that the leaf area range concerning light in different (30, 40, and 50 days) showed range from minimum 96.29 cm 2 /leaflet to maximum 461.96 cm 2 /leaflet. Whereas Kaur & Kumar (2020) reported leaf area in mungbean ranging from 27 cm 2 /leaf to 30 cm 2 /leaf.…”

Crop Diversification Grown as Strip Intercropping Can Improve Farmers' Return in a Dryland with Sandy Soil

“…The shading effect of maize and chili plants in the maize + mungbean + chili treatment (the position of the row of mungbean crops was between the rows of maize and chili plants), was likely to be the low productivity of mungbean crops in the strip intercropping treatment. It was previously reported that some varieties of mungbean crops are relatively sensitive to shade, so it can reduce crop yields (Hossain et al, 2017). The selection of mungbean varieties that are relatively tolerant to shade is important in diversifying crops through intercropping.…”