Karakter Morfo-fisiologi dan Hasil Padi Gogo Toleran Kekeringan

The objective of this study was to obtain varieties with high yield along with proper morpho-physiological characters under drought condition. Eleven varieties of upland rice i.e., Gilirang, Situ Patenggang, Kalimutu, Aek Sibundong, Batutegi, Towuti, Sunggal, Danau Gaung, Way Apo Buru, Danau Tempe, and Situ Bagendit were characterized based on morphology, physiology, and yield. Non factorial Complete Randomized Block Design was used with three times repetition. Parameters measured were morphological characters, physiological characters, and yield components. Morphological characters measured were plant height, number and area of leaf, shoot dry biomass, tiller number, and total root length. Physiological characters measured were plant growth rate, net assimilation rate, and relative growth rate. Yield components measured were number and length of panicle, number of seeds per panicle, 1000 seeds weight, weights of seed per panicle, weights of seed per plot, and weights of seed per hectare. The results showed that Danau Tempe variety had better characters against drought stress compared to the other varieties with higher yields supported by high plant growth rate, relative growth rate, chlorophyll content and leaf area with low accumulation of proline content and short root length. Keywords: drought, morphological character, upland rice variety, yield

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Plant Growth Analysis: The Variability of Relative Growth Rate Within a Sample

Annals of Botany ◽

10.1093/oxfordjournals.aob.a088112 ◽

1991 ◽

Vol 67 (2) ◽

pp. 137-144 ◽

Cited By ~ 21

Author(s):

D. R. CAUSTON

Keyword(s):

Growth Rate ◽

Plant Growth ◽

Relative Growth Rate ◽

Growth Analysis ◽

Relative Growth

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NaCl salinity affects lateral root development in Plantago maritima

Functional Plant Biology ◽

10.1071/fp03222 ◽

2004 ◽

Vol 31 (8) ◽

pp. 775 ◽

Cited By ~ 23

Author(s):

Michael Rubinigg ◽

Julia Wenisch ◽

J. Theo M. Elzenga ◽

Ineke Stulen

Keyword(s):

Growth Rate ◽

Relative Growth Rate ◽

Root Length ◽

Lateral Root ◽

Lateral Roots ◽

Third Order ◽

Lateral Root Primordia ◽

Relative Growth ◽

Length Growth ◽

Lateral Root Length

Root growth and morphology were assessed weekly in hydroponically-grown seedlings of the halophyte Plantago maritima L. during exposure to 0, 50, 100 and 200 mm NaCl for 21 d. Relative growth rate was reduced by 25% at 200 mm NaCl. The lower NaCl treatments did not affect relative growth rates. Primary and lateral roots responded differently to NaCl. While primary-root length increased at all NaCl concentrations, total lateral-root length increased at 50 and was not affected at 100 mm but was considerably reduced at 200 mm NaCl. NaCl concentrations of 50 and 100 mm, which had no effect on relative growth rate or total lateral-root length, severely affected root branching pattern in that the number of first, second and third order laterals was reduced. At 200 mm NaCl third order laterals were not formed at all. However, mean lateral-root length was increased at all NaCl concentrations and was highest at 200 mm NaCl. We conclude that the increase in total lateral-root length in plants at 50 and 100 mm NaCl was mainly caused by increased length growth, while the decrease in total lateral-root length at 200 mm was the consequence of inhibition of lateral root primordia and / or the activation of apical meristems rather than reduced length growth.

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Water Relations of Beans I. Effects of Water Stress on Growth and Flowering

Experimental Agriculture ◽

10.1017/s0014479700004440 ◽

1969 ◽

Vol 5 (3) ◽

pp. 195-207 ◽

Cited By ~ 29

Author(s):

A. H. El Nadi

Keyword(s):

Growth Rate ◽

High Temperature ◽

Water Stress ◽

Plant Growth ◽

Relative Growth Rate ◽

Broad Bean ◽

Day Length ◽

Vegetative Period ◽

Relative Growth ◽

Made In

SummaryExperiments were made in glasshouses, growth cabinets and growth rooms to study the differential responses of the broad bean to water stress during the vegetative and flowering phases of growth. Plants in the flowering phase proved to be more sensitive to drought than in the vegetative period, and there were different responses (Relative Growth Rate) to temperature at different stages of plant growth. Day length and temperature influenced the position of the earliest flower initials on the stem, and intensity of flower shedding was aggravated by high temperature.

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Analysis of Plant Growth and Yield in Varieties of Tomato (Solanum lycopersicum L.) Grafted onto Different Eggplant Rootstocks

International Journal of Agronomy ◽

10.1155/2021/6630382 ◽

2021 ◽

Vol 2021 ◽

pp. 1-11

Author(s):

Evy Latifah ◽

Amik Krismawati ◽

Mohammad Saeri ◽

Zainal Arifin ◽

Bas Warsiati ◽

...

Keyword(s):

Growth Rate ◽

Plant Growth ◽

Leaf Area ◽

Relative Growth Rate ◽

Net Assimilation Rate ◽

Growth And Yield ◽

Assimilation Rate ◽

Relative Growth ◽

Tomato Plants ◽

Net Assimilation

This study aimed to examine plant growth of tomato grafted onto different eggplant rootstocks. We applied a randomized block design comprising twelve treatments with three replicates. Three varieties of tomato—Cervo, Karina, and Timoty—and three rootstocks—Gelatik, EG203 line, and Solanum torvum—were selected for this study. Nongrafted tomato plants of the same varieties were used as controls. The variables recorded were the number of branches, the diameter of scions and rootstocks, root length, and root dry weight at 4, 6, 8, and 10 weeks after planting (WAT) and relative growth rate, specific leaf area, and net assimilation rate at 4, 8, and 12 WAT. Grafted tomato plants demonstrated better growth than controls. There was a significant relationship between yield, plant growth parameters, and photosynthetic organs, expressed by higher production, greater scion diameter, longer roots, and increased relative growth rate, leaf area ratio, and net assimilation rate of grafted plants, compared to the controls.

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Plant growth promoting rhizobacteria alleviates drought stress in potato in response to suppressive oxidative stress and antioxidant enzymes activities

Scientific Reports ◽

10.1038/s41598-020-73489-z ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Tahira Batool ◽

Shafaqat Ali ◽

Mahmoud F. Seleiman ◽

Naima Huma Naveed ◽

Aamir Ali ◽

...

Keyword(s):

Growth Rate ◽

Drought Stress ◽

Plant Growth ◽

Relative Growth Rate ◽

Soluble Sugars ◽

Plant Growth Promoting Rhizobacteria ◽

Growth And Yield ◽

Relative Growth ◽

Relative Water ◽

Plant Growth Promoting

Abstract Maintenance of plant physiological functions under drought stress is normally considered a positive feature as it indicates sustained plant health and growth. This study was conducted to investigate whether plant growth-promoting rhizobacteria (PGPR) Bacillus subtilis HAS31 has potential to maintain potato growth and yield under drought stress. We analyzed trends of chlorophyll concentration, photosynthesis process, relative water content, osmolytes, antioxidants enzymes and oxidative stress, relative growth rate, tuber and aboveground biomass production in two potato varieties, Santae (drought-tolerant) and PRI-Red (drought-sensitive). Plants of both genotypes were treated with 100 g of HAS31 inoculant at 10 days after germination and exposed to different soil relative water contents (SRWC), including 80 ± 5% (well watered), 60 ± 5% (moderate stress) and 40 ± 5% SRWC (severe stress) for 7 days at tuber initiation stage (30 days after germination). The drought stress reduced plant relative growth rate, biomass production, leaf area, number of leaves and tubers, tuber weight, and final yield. The drought-stressed plants showed decline in chlorophyll contents, membrane stability, leaf relative water contents and photosynthetic rate. Under drought stress, enzymatic activity of catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD), contents of total soluble sugars, soluble proteins and proline increased. The application of PGPR reduced the impact of drought and maintained higher growth and physio-chemical traits of the plants. The plants with PGPR application showed higher relative growth rate, dry matter production, leaf area, number of tubers, tuber weight and yield as compared to plants without PGPR. The PGPR-HAS31 treated plants maintained higher photosynthetic process, contents of chlorophyll, soluble proteins, total soluble sugars, and enzymatic activities of CAT, POD and SOD as compared to plants without PGPR. The results of the study suggest that plant growth regulators have ability to sustain growth and yield of potato under drought stress by maintaining physiological functions of the plants.

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Effect of Mycorrhiza on Growth Recovery of Neem Plants after Drought Exposure

HortScience ◽

10.21273/hortsci.31.4.647d ◽

1996 ◽

Vol 31 (4) ◽

pp. 647d-647

Author(s):

L. Phavaphutanon ◽

F.T. Davies ◽

S.A. Duray

Keyword(s):

Growth Rate ◽

Plant Growth ◽

Relative Growth Rate ◽

Recovery Period ◽

Growth Enhancement ◽

Vam Fungi ◽

Relative Growth ◽

Growth Recovery ◽

Root Regeneration ◽

Low Phosphorus

Growth recovery of mycorrhizal (VAM) and nonmycorrhizal (non-VAM) neem plants after drought exposure were followed under low phosphorus conditions. Drought significantly decreased plant growth regardless of mycorrhiza. Relative growth rate of droughted plants was greater than nondroughted plants during the growth recovery period, and compensated the loss of growth during the previous drought. VAM increased plant growth and improved regeneration of new roots outside the original root balls, particularly in plants previously exposed to drought. New roots of VAM plants were readily colonized by the VAM fungi, while those of non-VAM plants remained uncolonized. VAM growth enhancement after drought exposure was associated with greater uptake of phosphorus and other nutrients, and improved root regeneration.

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