Tolerance of F6 Red Rice Lines against Iron (Fe) Stress

Abstract

Dryland area in Indonesia reaches 108.8 millions ha (69.4%) of the total dry land with the potential to expand the area of food crops reaching 7.1 million ha, which is dominated by ultisol and oxisol soil types. Plant constraint cultivation on ultisol soil types is the acidic soil pH with high Al and Fe levels. One of the efforts that can be made to cultivate plants on ultisol soil is the selection of plants that are tolerant of Fe stress. This study aimed to determine a tolerance level and F6 red rice lines that were tolerant of iron (Fe) stress in ultisol soils. The experimental design used was factorial Completely Randomized Design (CRD) consisting of 2 factors, the first factor consisted of 12 treatments (10 test lines and 2 comparison varieties) and the second factor was iron stress with concentrations (0 ppm and 551,55 ppm). The stress was applied after 3 WAP. The stress resistance test to iron (Fe) should that all lines of red rice F6 on ultisol soils have a score of 1 which indicates the stress tolerance of Fe at a concentration of 551,55 ppm Fe. The 23A-56-30-25-12 and 23A-56-30-25-13 lines were the best lines that were tolerant of 551,55 ppm iron (Fe) stress with the highest growth and yield. The lines tested can be developed on ultisol soils because they are tolerant of Fe.

Evaluation of the distinct and uniformity of upland rice superior varieties candidates

“…The weight of rice seeds per plot of rice plants is generally influenced by environmental factors as well as pest and disease attacks [26]. The low rice production can also be genetically influenced by the character of the parents who have small seed sizes so that the weight of the seeds produced is also low [27].…”

“…The use of superior varieties can increase rice production [6], and optimize the use of sub-optimal land for rice cultivation. Sub-optimal land such as dry land reaches 108.8 million ha (69.4%), as much as 7,1 million ha of the total dry land potential for food crops [7]. An alternative to sub-optimal land use is the use of adaptive superior varieties [8].…”

Uniformity test of the upland rice lines F8 from crosses of local Bangka rice and lodging resistance superior varieties in Belitung Regency

“…Grain filling rate is affected by external environmental conditions, pest and disease attacks [36]. According to [37], the weight of filled grains for each plot is also influenced by the genetics of the character of elders.…”

Azolla for Water and Land Phytoremediation Against Heavy Metals: A Mini Review

“…Excessive Fe damages plants as it impedes Ca, P and K absorption; consequently, plants have loweven zeroproductivity [32][33][34]29]. Fe poisoning poses indications of short growth, small number of bunch and panicle, bronzing leaf, short root, late blossoming, and late panicle development [35,36,32].…”