Karakter morfologi akar sebagai indikator kekurangan air pada padi lokal Superwin (Root-morphological characters as water-deficit indicators in local rice Superwin)

Abstract

Abstrak Evaluasi karakter morfologi akar telah dilakukan untuk menentukan karakter morfologi akar yang potensial sebagai indikator adanya kekurangan air pada padi (Oryza sativa L.) di antara panjang akar, volume akar, berat basah akar, berat kering akar, rasio akar:tajuk dan rasio panjang akar:tinggi tanaman. Eksperimen ini dilakukan di rumah kaca dan menggunakan 2 varietas padi (Superwin dan IR 64) pada fase vegetatif yang ditumbuhkan pada media tanah di polybag dengan perlakuan kekeringan (tidak disirami selama 14 hari) dan disirami sampai kapasitas lapang (kontrol). Panjang akar dan rasio panjang akar:tinggi tanaman dapat dijadikan indikator kekurangan air pada padi Superwin dan IR 64. Superwin yang merupakan padi sawah dapat dipertimbangkan untuk ditanam di lahan kering. Kata kunci: indikator, kekeringan, morfologi akar Abstract Root-morphological characters in rice (Oryza sativa L.) were evaluated to determine the potential characters as water-deficit indicators among the length, volume, fresh weight, dry weight, ratio root:shoot and ratio root length:plant height. The experiment was conducted in the glasshouse using 2 rice varieties (cv. Superwin and IR 64) grown in the soil mixture at the vegetative phase. The treatments in this experiment were water deficit (without water for 14 days) and well-watered (watering until field capacity). The root length and ratio root length:plant height were potential as water- deficit indicators in Superwin dan IR 64. The upland rice, Superwin, should be considered to be cultivated in the water limited area. Keywords: drought, indicator, root morphology

Identification of the physiological characteristics of some local Aceh rice (Oryza sativa L.) germplasms

“…Its length could be the indicator of water deficit in rice plants, well-performed root system is important in plant growth. The study by [15] discovered that root length is vital for rice plants, which it could be an indicator for water deficit in rice by accelerating the length as an act of water-deficit resistance, demonstrating potential characteristic. Hasanah et al [16] also agreed that Rooting capacity in rice has been linked to productivity under drought stress.…”

“…There are genetic IOP Publishing doi:10.1088/1755-1315/1302/1/012040 8 differences between varieties affecting the rice production. In addition, According to [19], the higher the number of panicles produced, the higher yield obtained. From those statements above, we can conclude that that higher number of panicles contributed to higher yield.…”

PHYSIOLOGICAL ACTIVITY ANALYSIS AND GROWTH OF EBONY SEEDLINGS (Diospyros celebica Bakh) TREATED BY VARIOUS BIOFERTILIZER COMBINATIONS

“…Calculation of the ratio of root shoots is one way to find out the quality of seedlings. Eligible seedlings height are 10-40 cm, RSR = 1:1 or 2:1, wood around the hard root neck, symmetrical header, and solid root system (Torey et al, 2014). The seedlings assessed are ready for planting if the range of RSR is 2-5 (Jumadi & Hartono, 2015).…”

Growth and yield responses of two cowpea (Vigna unguiculata L.) varieties on different irrigation levels

“…Root length is one of the morphological characteristics reported to be related to plant resistance to drought. Root length describes the ability of plants to obtain water supplies, including nutrient elements, in deeper soil layers (Torey et al, 2014). Water stress conditions significantly affect plant performance (Moctava et al, 2013).…”